If KMD had ruled China instead of CPC since 1949:
1. China would have never turned into a Marxist/ Communist.
2. The US would have never allied with Japan soon after WW2 - the very reason Japan recovered quickly as a loser of WW2 was because China turned red, hence the US felt the urgent need to ally with Japan to encircle red-China and red-Russia.
3. There would had been no Korean War : 100,000s of lives of both sides saved
4. The would had been no Communist VietNam, and would have had no VietNam War with the US, neither China-Vietnam war - millions of lives saved as a result.
5. China would have stationed troops in Japan as the US ally right after the war as a winner of WW2. Okinawa would have been another independent country friendly towards China sitting in the UN, like most of its history instead of being a part of Japan.
6. Japan's WW2 top criminals would have been executed. No one today would have heard the name called Shinzo Abe
7, there wouldn't have been Cultural Revolution and Great Leap forward...millions of Chinese lives ( many of whom were Chinese intellectual elites at a time) saved.
8. China would have been industrualised, and have freedom of speech and press, etc, almost the same way as Taiwan did, but on a much bigger scale at a much advanced level.
9. China would have become an economical and military statue -quo power of the US long ago, both as a friend and as a technological competitor to the US in the Parcific and around the multi-polar-world. As a result, with combined effort of both countries human beings would have probabaly colonised Mars years ago.
10. There have been no issue of Diao Yu Islands.
11. China's map today would have included: outter Mongolia, South Tibet, and a HUGE portion of today's Russian Far East - the ancestral homeland of the Manchus and teh Mongols.
12. The ole Soviet would have collapsed long ago, other than 1989, due to the combi efforts of China and the US - the allied powers.
13. Japan today would have become a little brother - a kind of "tributory state" - of China, like most of its time in the history.
14, both ChineseTiger and Speeder 2 would have been living in China instead.
15. India would have toilets long ago due to China's donations, rather than depending on Melinda & Bill Gates Foundation and Modi ji's world-touring begging bowl
...
I can go on.
1. I cherish what we have achieved, and work for the future.
2. You consider America is an angel, China is a baby needing milk and America will feed China after warii.
3. During the civil war and WWII, America had communicated with Chinese Communist Party, America is smart at diplomat.
4. Originate back to the China-Japan war in 1894, China totally failed in the war and China lost navy, ceded Taiwan, paid for 950 million gram silver. Do you think Japan alone defeated China? No, definitely not. That's the West long term goal. At that time, China actually fought against Britain, France, and Japan together. America also provide weapons to Japan, Russia had threat in the North East China. See? This is American real goal, the intention always continued till nowadays. Japan had been an European agent in Asia since 1850's. That's not because Japanese is smart or good at diplomat, the reason is that Japan easily could be controlled.
5. Why China became Communism country, why CCP could win the civil war? Because Japan and USSR work together. Japan attack crazy against incumbent KMT govt, made millions of Chinese lost land, job, business, factory, so those poor people all joined in the CCP, and USSR provide massive of weapons to them.
6. The US didn't support KMT govt during the WWII, what can make us believe they would support China after WWII? You should know America always trade oil, weapons with Japan after 1931, when Japan started war in north east China, this lasted for 10 years, till Japan attack Hawaii in 1941. ( Please note during WWII, Hawaii was not American territory, America just had military base there. )
7. It seems you give all Chinese fate and hopes to the hands of American, you are too native. America is a pragmatic country, they change policy and diplomatic relations very quickly and without any reasons. When they need Iraq, they are good buddy; when they don't need Iraq, they beat them to death. No, Chinese fate must be grabbed on our own hands, this is the only way back to be a great country again.
8. Within 20 years from 1949-1969, China re-build massively heavy industry, such as steel, shipbuilding, airplane building, tank, rocket, atomic, space and basic agriculture system, and light industry such as food, clothes. Not to mention, the railway connecting east to west, north to south, road net connecting all provinces.
You should know in 1860's China had already built up lots of such industry, but all were destroyed by British, and later the Japanese. See the steel factory in China in 1870's.
9. International and regional diplomat is important for a country, especially for small and middle-sized country, but the most important thing is the country itself. The all your suppose are based on one condition: America would help China after WWII. My buddy, this point is totally wrong, especially for an American born Chinese. America had no responsibility to help China.