China Science & Technology Forum

[cirr]

The world's most advanced 3rd generation 100% low-floor tram prototype rolling off the production line at CSR's Qingdao Sifang Co. Ltd on 17.02.2014:

Employing such world's leading technologies as permanent magnet synchronous motor direct drive and articulated bogies。

最新一代永磁有轨电车样车在青岛下线-新华网

 

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Post #3234 of Chinese Economy News & Updates | Page 216
Thanks for positng @Martian2

Chinese scientists make flat surface behave like spherical antenna

Scientists make flat surface behave like spherical antenna | Christian Science Monitor

"Scientists make flat surface behave like spherical antenna
Scientists create an artificial surface that can bend and focus electromagnetic waves like an antenna
By Sudeshna Chowdhury, Staff writer / April 15, 2014

The prototype of the fabricated metasurface lens shown with simulated x components of electric fields at 9 GHz with the source placed at the bottom left, right and center of the lens. (Credit: T.J. Cui/Southeast University Nanjing)

Researchers from China have created artificial surfaces that can bend and focus electromagnetic waves just like an antenna.

By arranging a large collection of tiny, metallic, U-shaped structures on the surface of a dielectric material, the team manufactured what they are calling "the first broadband transformation optics metasurface lens." The new lens has properties not found in nature.

The unique lens was engineered to mimic the properties of a Luneburg lens, a spherical lens first developed in the 1940s. Most lenses made up of single materials, such as plastic or glass, can uniformly bend light. The refractive index of a lens depends on what material it is made of. Glass, for example, has a refractive index higher than than of quartz. But in a Luneburg lens, the refractive index varies across its spherical surface, so the light bends depending on which part it hits.

Also, a typical Luneburg lens is unusual because it “can focus plane waves to a point at the edge of the lens, or radiate waves of the point source with high directivities, according to the findings of the study published in the journal of Applied Physics Letters on April 14, 2014.

Simply put, such a lens is capable of focusing light or electromagnetic waves to an “off-axis point at the edge of the lens." This means that the lens doesn’t directly focus light in front of it or behind it like a normal lens does. It can also direct electromagnetic waves coming from a nearby point source and radiate them in a particular direction.

Luneburg lenses have a wide range of applications as radar reflectors and as microwave antennae.

But the spherical nature of a Luneburg lens limits its use in other applications, Tie Jun Cui from Southeast University in Nanjing, China and an author on the paper said in a press release.

Therefore, the idea was to create a lens which would be flat yet it would have all the properties of a Luneburg lens.

"We now have three systematical designing methods to manipulate the surface waves with inhomogeneous metasurfaces, the geometric optics, holographic optics, and transformation optics," Dr. Cui said. 'These technologies can be combined to exploit more complicated applications.'"

 

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Also some great contributions by our members: @cirr @Martian2 @StarCraft_ZT @Edison Chen @qwerty @xhw1986 @Fukuoka @LTE-TDD @Nan Yang @haidian for their postings on various threads:

Duplicated topic - my bad @cirr
Making ten 3-D Houses in 1 day, Shanghai, China
How a Chinese Company 3D-Printed Ten Houses in a Single Day

Airbus，university team on 3-D printing
I really want this Chinese store to make me a 3D-printed mini-me
3D Printing: Life in 3D

Chinese test self-printing robots
Use of robots increases in China, may overtake Japan

Semiconductor showdown: TSMC, Intel, Samsung, Global Foundries, IBM, SMIC, and UMC | Page 3
150 megapixel full-Frame CMOS image sensor from Chinese fabless

University of Chinese Academy of Sciences ranks 1st in Nature Publishing Index 2013 Asia-Pacific

China moves past France and U.K. into 7th place in USPTO patents

INEST‘s Multi-functional LBE Integrated Experimental Loop KYLIN-II Operational

China's New Wager - Pulling Energy From the Ocean
China to build a huge underground neutrino experiment
Chinese scientists urged to develop new thorium nuclear reactors by 2024
Which country has more solar capacity than rest of world combined?
China gives you the world's 1st triboelectrification-based thin-film nanogenerator
China sets world record on solar power installations of 12GW last year
China and Russia to build world’s biggest thermal power plant

"Space Odyssey": China' s aspiration in future space exploration
China to launch first "space shuttle bus" this year
China capable of exploring Mars: leading space scientist
Yuan Zheng-1 Upper Stage Set for Launch in 2014
Preparation for Chang'e-5 launch on schedule

China charts course into LNG shipbuilding

Chin Opens Fourth Station in Antarctica

Huawei to Invest $600M in 5G Research & Innovation by 2018

5 ways China’s WeChat is more innovative than you think

China’s poorest beat our best pupils
Brain drain in reverse: China now world's No. 3 education hub

Shanghai high: ‘Skywalkers’ use the force to scale world’s 2nd-tallest tower (PHOTOS, VIDEO)

China plans the world's longest undersea tunnel

Qinghai-Tibet Railway Extends to the City Nearest to Mt. Everest in 2014
Xiamen-Shenzhen、Xi'an-Baoji、Liuzhou-Nanning、Chongqing-Lichuan and more HSRs Open Today

12

 

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Chinese Scientists' successful 3D printing of a Cervical Tumour

Source:
Three-dimensional printing of Hela cells for cervical tumor model in vitro - Abstract - Biofabrication - IOPscience

Abstract

Advances in three-dimensional (3D) printing have enabled the direct assembly of cells and extracellular matrix materials to form in vitro cellular models for 3D biology, the study of disease pathogenesis and new drug discovery. In this study, we report a method of 3D printing for Hela cells and gelatin/alginate/fibrinogen hydrogels to construct in vitro cervical tumor models. Cell proliferation, matrix metalloproteinase (MMP) protein expression and chemoresistance were measured in the printed 3D cervical tumor models and compared with conventional 2D planar culture models. Over 90% cell viability was observed using the defined printing process. Comparisons of 3D and 2D results revealed that Hela cells showed a higher proliferation rate in the printed 3D environment and tended to form cellular spheroids, but formed monolayer cell sheets in 2D culture. Hela cells in 3D printed models also showed higher MMP protein expression and higher chemoresistance than those in 2D culture. These new biological characteristics from the printed 3D tumor models in vitro as well as the novel 3D cell printing technology may help the evolution of 3D cancer study.

FEATURED ARTICLE
Yu Zhao1,2,6, Rui Yao1,2,6, Liliang Ouyang1,2, Hongxu Ding1,2, Ting Zhang1,2, Kaitai Zhang3, Shujun Cheng3 and Wei Sun1,2,4,5,7

Affiliations
weisun@tsinghua.edu.cn sunwei@drexel.edu

1 Department of Mechanical Engineering, Biomanufacturing Center, Tsinghua University, Beijing, People's Republic of China
2 Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing, People's Republic of China
3 State Key Laboratory of Molecular Oncology, Beijing Key Laboratory for Carcinogenesis and Cancer Prevention, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, People's Republic of China
4 Biomanufacturing Engineering Laboratory, Shenzhen Tsinghua Graduate School, Shenzhen, People's Republic of China
5 Department of Mechanical Engineering, Drexel University, Philadelphia, PA, USA
6 These authors contributed to this work equally.
7 Author to whom any correspondence should be addressed.

 

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Generating electricity by moving a droplet of ionic liquid along graphene

Abstract
Since the early nineteenth century, it has been known that an electric potential can be generated by driving an ionic liquid through fine channels or holes under a pressure gradient. More recently, it has been reported that carbon nanotubes can generate a voltage when immersed in flowing liquids, but the exact origin of these observations is unclear, and generating electricity without a pressure gradient remains a challenge. Here, we show that a voltage of a few millivolts can be produced by moving a droplet of sea water or ionic solution over a strip of monolayer graphene under ambient conditions. Through experiments and density functional theory calculations, we find that a pseudocapacitor is formed at the droplet/graphene interface, which is driven forward by the moving droplet, charging and discharging at the front and rear of the droplet. This gives rise to an electric potential that is proportional to the velocity and number of droplets. The potential is also found to be dependent on the concentration and ionic species of the droplet, and decreases sharply with an increasing number of graphene layers. We illustrate the potential of this electrokinetic phenomenon by using it to create a handwriting sensor and an energy-harvesting device.

Authors and Affiliations
Jun Yin, Xuemei Li, Jin Yu, Zhuhua Zhang, Jianxin Zhou & Wanlin Guo
State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, and Institute of Nanoscience, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China

LINK

Another report on the same:

Pouring Saltwater Over Graphene Generates Electricity

Adam Clark Estes
4/15/14 11:15am

SEXPAND

A team of Chinese scientists did an impossible-sounding thing. They created electricity simply by dragging a droplet of saltwater across a layer of graphene. No big fires, no greenhouse gases, no fuss. They created energy with just a miracle material and one of the most plentiful substances on Earth.

The science behind the effect is actually quite simple. When the droplets of saltwater sat static on the graphene, they carried an equal charge on both sides. But, when moved across the surface of the graphene, the electrons in the saltwater were desorbed on one end of the graphene and absorbed on the other, generating a measurable voltage along the way. The faster the water moves, the higher the voltage it generates—although the total voltage was still pretty low, about 30 millivolts. A standard AA battery, by comparison, produces about 1.5 volts. It helps that graphene is insanely conductive.

So that's not much—not yet—but it's something. It's not the voltage that scientists are excited about, though. It's the scale. Current hydroelectric power solutions can only exist on a very large scale. Think Hoover Dam. However, this method for producing hydroelectric power could support nano-sized generators without any byproducts. They do believe the method will scale up, too. That is, if anybody can afford that much graphene.

LINK

 

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中国新建远洋科考船“向阳红10”号正式入列
“Xiangyanghong 10" China's comprehensive Ocean Scientific Research vessel is Launched
2014-3-30

Link

Above photo credits: Xinhuanet

 

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The prestigious Gregori Aminoff Prize - 2014 goes to

施一公 Yigong Shi
Professor
School of Life Sciences
Tsinghua University
"for his groundbreaking crystallographic studies of proteins and protein complexes that regulate programmed cell death"

Credit: chisa.edu.cn

Kungliga Vetenskapsakademien - Pristagare

 

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New Chinese herbal medicine has significant potential in treating Hepatitis C

Photo Credit:
Potential hepatitis C cure found in Chinese herb


London, UK, Saturday 12 April 2014: Data from a late-breaking abstract presented at the International Liver CongressTM 2014 identifies a new compound, SBEL1, that has the ability to inhibit hepatitis C virus (HCV) activity in cells at several points in the virus’ lifecycle.[1]

SBEL1 is a compound isolated from Chinese herbal medicines that was found to inhibit HCV activity by approximately 90%. SBEL1 is extracted from a herb found in certain regions of Taiwan and Southern China. In Chinese medicine, it is used to treat sore throats and inflammations. The function of SBEL1 within the plant is unknown and its role and origins are currently being investigated.

Scientists pre-treated human liver cells in vitro with SBEL1 prior to HCV infection and found that SBEL1 pre-treated cells contained 23 percent less HCV protein than the control, suggesting that SBEL1 blocks virus entry. The liver cells transfected with an HCV internal ribosome entry site (IRES)-driven luciferase reporter that were treated with SBEL1 reduced reporter activity by 50% compared to control. This suggests that that SBEL1 inhibits IRES-mediated translation, a critical process for viral protein production.

In addition, the HCV ribonucleic acid (RNA) levels were significantly reduced by 78 percent in HCV infected cells treated with SBEL1 compared to the control group. This demonstrates that SBEL1 may also affect the viral RNA replication process.

Prof. Markus Peck-Radosavljevic, Secretary-General of the European Association for the Study of the Liver and Associate Professor of Medicine, University of Vienna, Austria, commented: “People infected with hepatitis C are at risk of developing severe liver damage including liver cancer and cirrhosis. In the past, less than 20 percent of all HCV patients were treated because the available treatments were unsuitable due to poor efficacy and high toxicity. Recent advances means that we can now virtually cure HCV without unpleasant side effects. However, the different virus genotypes coupled with the complexity of the disease means there is still a major unmet need to improve options for all populations.”

Professor Peck-Radosavljevic continued: “SBEL1 has demonstrated significant inhibition of HCV at multiple stages of the viral lifecycle, which is an exciting discovery because it allows us to gain a deeper understanding of the virus and its interactions with other compounds. Ultimately this adds to our library of knowledge that may bring us closer to improving future treatment outcomes.”

HCV invades cells in the body by binding to specific receptors on the cell, enabling the virus to enter it.2 Once inside, HCV hijacks functions of the cell known as transcription, translation and replication, which enables HCV to make copies of its viral genome and proteins, allowing the virus to spread to other sites of the body.2 When HCV enters the host cell, it releases viral (+)RNA that is transcribed by viral RNA replicase into viral (-)RNA, which can be used as a template for viral genome replication to produce more (+) RNA or for viral protein synthesis. Once the viral RNA is transcribed, HCV initiates a process known as IRES-mediated translation, which allows the viral RNA to be translated into proteins by bypassing certain protein translation checkpoints that would normally be required by the host cell to start protein translation.[2],[3] Viral RNA is the genetic material that gives HCV its particular characteristics. This process enables the virus to take advantage of the host cell’s protein translation machinery for its own purposes.

There are an estimated 150 million to 200 million people living with chronic HCV and more than 350,000 people die annually from HCV-related diseases.[4] HCV is transmitted through blood contact between an infected individual and someone who is not infected. This can occur through needlestick injuries or sharing of equipment used to inject drugs.[5]

Disclaimer: the data referenced in this release is based on the submitted abstract. More recent data may be presented at the International Liver Congress™ 2014.

- Ends -

Contributors:

[1] C.W Lin et al. Multiple Effects Of Chinese Herbal Medicine SBEL1 On Hepatitis C Virus Life Cycle. Abstract presented at the International Liver Congress™ 2014

Affiliated with
Division of Gastroenterology and Hepatology, Department of Medicine, E-DA Hospital/I-Shou University, Kaohsiung, Taiwan
Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan

[2] Scheel, T.K.H. and Charles M Rice, C.M. Understanding the hepatitis C virus life cycle paves the way for highly effective therapies. Nature Medicine, 2013; 19: 837–849

[3] Komar, A.A. and Hatzoglou. Cellular IRES-mediated translation. Cell cycle, 2011; 10 (2): 229-240

[4] European Comission. Horizon 2020. Breaking the Hepatitis C lifecycle. February 2014. Available atBreaking the Hepatitis C lifecycle - European Commission Accessed 19.03.14.

[5] Centers for Disease Control and Prevention. Hepatitis C FAQs for the Public. 2014. Available atCDC DVH - Hepatitis C FAQs for the Public Accessed 19.03.14.

LINK

 

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The world's oldest cheese has been found buried with Chinese mummies

By Katie Drummond on February 27, 2014

LINK

USA Today reports, the cheese was found in clumps on the bodies of well-preserved mummies (including the one shown above) in China's Small River Cemetery Number 5. The location is unique, because bodies interred in the region were essentially freeze-dried, meaning their features, clothing, and culinary accompaniments are still discernible even thousands of years later. In large part, that incredible preservation is due to a combination of dry air, salty earth, and tightly-sealed burial conditions.

The cheese itself, which was found over a series of archeological digs dating back to 2002, was identified using analysis of protein and fat content. Investigators speculate that the cheese was made using a kefir starter (bacteria and yeast) which is then combined with milk. The majority of today's cheeses, in contrast, rely on rennet — an enzyme taken from an animal's gut — to curdle milk and yield a final product. But the kefir strategy, researchers say, makes sense: it's significantly easier because it doesn't necessitate the slaughter of a young animal, and kefir-based cheese is lower in lactose, which aligns with the prevalent lactose intolerance among Asian populations. More details on the researchers' methods and analyses will be laid out in a forthcoming issue of the Journal of Archaeological Science.

Here

Proteomics evidence for kefir dairy in Early Bronze Age China

Authors

Yimin Yang - a, b, 1; Anna Shevchenko - c, 1; Andrea Knaust - c;
Idelisi Abuduresule - d; Wenying Li - d; Xingjun Hu - d; Changsui Wang -a;
Andrej Shevchenko - c

Abstract

Cheese making has been inferred at several sites in northern Europe as early as the 6th millennium BC and was common in Egypt and Mesopotamia in 3rd millennium BC. However, the remains of ancient cheeses have never been found and recipes of ancient dairy, its production scale, social and economic impact remain poorly understood. Here we present direct proteomics evidence for the production of an earliest known cheese that was found as an organic mass associated with the mummies of Early Bronze Age cemetery of Xiaohe (1980–1450 BC) in Xinjiang, China. Kefir fermentation of ruminant milk by a symbiotic culture ofLactobacillus kefiranofaciens and other lactic acid bacteria and yeasts was the basis of robust, scalable, probiotic, lactose-free dairy and a key technological advance that introduced economic benefits of extensive herding into a semi-pastoral household of the Eastern Eurasia population already in the Early Bronze Age.

Graphical abstract




Affiliations

a- Department of Archaeometry, University of Chinese Academy of Sciences, Beijing 100049, PR China
b- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, PR China
c- MPI of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
d- Xinjiang Cultural Relics and Archaeology Institute, Ürümchi 830000, PR China

1- Equal contribution of Yimin Yang and Anna Shevchenko.

 

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Smart responsive phosphorescent materials for data recording and security protection

Nature Communications 5, Article number: 3601 doi:10.1038/ncomms4601
Received 21 October 2013
Accepted 10 March 2014
Published 07 April 2014

Abstract

Smart luminescent materials that are responsive to external stimuli have received considerable interest. Here we report ionic iridium (III) complexes simultaneously exhibiting mechanochromic, vapochromic and electrochromic phosphorescence. These complexes share the same phosphorescent iridium (III) cation with a N-H moiety in the N^N ligand and contain different anions, including hexafluorophosphate, tetrafluoroborate, iodide, bromide and chloride. The anionic counterions cause a variation in the emission colours of the complexes from yellow to green by forming hydrogen bonds with the N-H proton. The electronic effect of the N-H moiety is sensitive towards mechanical grinding, solvent vapour and electric field, resulting in mechanochromic, vapochromic and electrochromic phosphorescence. On the basis of these findings, we construct a data-recording device and demonstrate data encryption and decryption via fluorescence lifetime imaging and time-gated luminescence imaging techniques. Our results suggest that rationally designed phosphorescent complexes may be promising candidates for advanced data recording and security protection.

Affiliations

Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
Huibin Sun, Shujuan Liu, Wenpeng Lin, Kenneth Yin Zhang, Wen Lv, Huiran Yang, Gareth Jenkins, Qiang Zhao &
Wei Huang
Institute of Advanced Materials and Jiangsu-Singapore Joint Research Center for Organic/Bio- Electronics & Information Displays, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
Huibin Sun, Xiao Huang, Fengwei Huo, Gareth Jenkins & Wei Huang

 

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China unveils native mobile operating system
Xinhua | 2014-1-9 19:54:07
By Agencies

Credit：expreview.com
Press Conference

Credit: kejixun.com
The slogan reads: 960 OS - Protect your cellphone, Safeguard your livelihood

Credit: upload.chinaz.com
A 960 OS display

A new mobile phone operating system was unveiled by a Chinese tech firm on Thursday, making it the country's first smart phone system with independent intellectual property rights.

The system, named 960 OS, was developed by the 同洲电子 Coship Electronics Co., Ltd. It is a brand new operating system following predecessors such as Android, IOS, and Windows phone, the Shenzhen-based company said.

960 OS is a native operating system based on the Linux kernel and took Coship 15 years to develop, said the company's chair, 袁明 Yuan Ming, noting that the system can provide better protection for information stored in a smart phone.

As the majority of smartphones in the Chinese market use foreign operating systems such as Android and IOS, the ownership of one system with independent IPR is essential for both national and individual information security, according to Liu Yunjie, an academician of the Chinese Academy of Engineering.

It can boost the competitiveness of China's mobile and Internet industry, he added.

LINK

Chinese researchers discover poisonous plant remedies
Xinhua | March 24, 2014 22:45
By Agencies

Credit: cal.vet.upenn.edu


Chinese scientists said on Monday that they have "tamed" wild poisonous plants on the Tibetan plateau, an achievement that can help protect livestock and prevent desertification.

Researchers with Tibet's Academy of Agricultural and Animal Husbandry Sciences have developed both drugs against the effects of locoweed, a common name for any plant that produces swainsonine, a phytotoxin harmful to livestock.

Wang Baohai, a researcher with the Lhasa-based academy, said the remedies included therapeutic liquid for oral administration and preventive pills based on Western medicine and traditional Chinese medicine respectively.

"According to clinical tests, the liquid can cure 95 percent of livestock poisoned by locoweed," said Wang Jinglong, another expert with the academy. "China has granted it a national patent."

The researchers have also figured out a comprehensive mechanism for locoweed prevention and treatment. They removed locoweed in a fenced area of grassland, where poisoned livestock can be isolated and recover.

Herdsmen call locoweed the enemy of grassland because livestock show symptoms of intoxication after eating the plant, which causes animal reproduction rates to drop or even death. Its rampant growth can also lead to grassland degradation.

In Tibet alone, locoweed is distributed across a total area of nearly 100 million mu (about 7 million hectares), leading to economic losses of more than 100 million yuan (about 16 million US dollars) annually.

But it is not a totally useless plant. According to Tsering Dorje, an academic with Tibet's Academy of Agricultural and Animal Husbandry Sciences, it is a valuable Chinese herbal medicine and can be edible after a detoxication processing. "It enjoys huge economic potential," he said.

Link

More info on the poisonous plant here:
Locoweed - Wikipedia, the free encyclopedia

 

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The world's most powerful hydraulic forging hammer
2014-04-17 09:23 无锡日报

@19,500 tons output, it can curve/forge a piece of 450 ton steel ingot /slab into the shape of a piece of aircraft carrier flight deck in one shot!

Credit: Wuxi Daily and Huangqiu military

 

[mike2000]

i'm impress by this thread. though china still has a long way to go to match the U.S. but its indeed good to see the country is advancing/catching up very fast. Keep it up , the world always needs new innovations and research to move forward. Maybe the BRICS can one day create a scientific research organization were they can pool in their efforts,skills and knowledge together.

 

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Unmanned deep sea (4500 m) bathyscaphe "The Seahorse" passes the trial test
April 22, 2014　Source：ChinaNews

Credit: sjtu.edu.cn

Credit: mydrivers.com

Credit: Caijing

Credit: Sohu

Credit: Sina

Credits for the above 2 pix: Xinhua News

 

[cirr]

China's high-speed trains will use 'Chinese chips'

People's Daily Online | 2014-4-23 10:56:55

By Agencies


China's first 8-inch IGBT (insulated gate bipolar transistor) chip production line, built by CSR (China South Locomotive & Rolling Stock Corporation Limited) Zhuzhou base, will be put in operation in June 2014.

This means that China has broken foreign monopoly on the core technology of high-speed trains, and China's high-speed trains will use the "Chinese chips."

The high-speed trains manufactured by CSR, with the domestic 8-inch IGBT chips installed, achieved a speed of over 600 kilometers per hour in the test run. CSR will become the only company in China which has comprehensively mastered IGBT chip technology R&D, module packaging & testing and system application.

China's high-speed trains will use 'Chinese chips' - SCI_TECH - Globaltimes.cn

China's high-speed trains will use 'Chinese chips'

People's Daily Online | 2014-4-23 10:56:55

By Agencies


China's first 8-inch IGBT (insulated gate bipolar transistor) chip production line, built by CSR (China South Locomotive & Rolling Stock Corporation Limited) Zhuzhou base, will be put in operation in June 2014.

This means that China has broken foreign monopoly on the core technology of high-speed trains, and China's high-speed trains will use the "Chinese chips."

The high-speed trains manufactured by CSR, with the domestic 8-inch IGBT chips installed, achieved a speed of over 600 kilometers per hour in the test run. CSR will become the only company in China which has comprehensively mastered IGBT chip technology R&D, module packaging & testing and system application.

China's high-speed trains will use 'Chinese chips' - SCI_TECH - Globaltimes.cn