i don't know, i think it should be multple use; someone says there are some new submarine will be in trial testing at the same time since one of the testing area is very near the Chinese submarine factory.
you can find the warning in MSA of PRC, or MSA of liaoning Province
http://www.msa.gov.cn/html/xinxichaxungongkai/index.html?id=9C219298-B27F-460E-995A-99401B3FF6AF
中华人民共和国辽宁海事局
辽航警0081 0082 0083
http://www.lnmsa.gov.cn/List_HangXingJingGao.aspx
wait and see if it is true or not
Han Hai Langshan: news! 002 basically determine the 23 to 26 day test! No navigation area has been released!
http://blog.sina.com.cn/s/blog_5f54ff2b0102xz85.html
There are important events, push forward today!
From deep nights on April 20 2018 to April...
China's Ministry of Commerce on Friday urged the United States to apply the brakes and be careful not to put bilateral trade relations in jeopardy, calling the recent U.S. restrictive measures on China "a very bad precedent."
China reveals U.S. tariff plans...
http://www.acae.com.cn/portal/Engine/Index_2.aspx
Product Introduction:
ACAE launched the R&D of engine for the C919 in the first place. At this stage, all the design works of demo engine has been completed, and ACAE started the trial-manufacture and tests for the components. The engine is...