台灣地位

The Republic of China receives Taiwan, North Vietnam and Hong Kong under Allied Order No.1. Because China was not strong enough, North Vietnam was taken back by France and Hong Kong was taken back by Britain.

Taiwan was occupied by Japan through war. China was a victorious nation in World War II and had the right to get back the territory it had lost.

 No, your argument is wrong. China was a victorious nation and could have taken back the lost territory by order, just as Ukraine took back the eastern part of Ukraine.

If only because of the word 'abandonment' by Japan, the status of Taipei becomes directly undetermined for Taiwan. Japan also gave up the Korean Peninsula, Hong Kong, the Thousand Islands, the Spratly Islands, Antarctica and the Southern Kuril Islands. There was also the unspecified treaty of the Russian-Japanese War, but at the time it was under Soviet control, the Lushun-Dalian Kantou Lend-Lease in Northeast China. Also at the end of WWII Japan declared direct occupation of French Vietnam, Cambodia and Laos, which was not even mentioned in the treaty. So are these still Japan's? Or whose?

Both the Republic of China and Korea were divided by civil war and did not participate in the 1951 San Francisco Peace Treaty Conference. How can the Korean War be fought if this is the case? How can the Korean War be fought if Japan is still willing to claim Takeshima (Dokdo)? I dare not say that North and South Korea are "undecided" or Japanese colonies!

France surrendered in WWII, and after WWII, it could go back to Indochina and rebuild its colonial empire. Did Japan sign the treaty? The Republic of China was the victorious nation in World War II and it was only natural that it should get back the territory it had lost. Japan, a criminal, had no right to say to whom to give the spoils of war after being arrested and declared defeated.