The only reason you got a seat was simply because you were still independent during the second World War while all other Asian countries where either our colonies or western colonies. moreover it was the KMT that did most of the fighting against Japan not CCP who was merely a guerilla force back then and avoided any major conflict /confrontation against Japan in other to preserve its strength against the KMT, WHICH was quite reasonable .
The reason why you got a seat was simply because you were the "last man standing" versus Nazi aggression, the rule which also applied to China, and the Soviet Union, all three took heavy fire from the Axis for many years and hardly survived. France was an exception, the whole country was already part of Nazi Third Reich in only a few weeks after the war started, and that was years ago before creation of UN.
"
The Four Policemen" was a term coined by
U.S. President Franklin D. Roosevelt, to refer to four major
Allies of World War II and founders of the
United Nations (UN): the
United States,
United Kingdom,
Soviet Union, and
Republic of China.
It was a pragmatic system based on the primacy of the strong — a "
trusteeship of the powerful," as he then called it, or, as he put it later, "the Four Policemen." The concept was, as Senator Arthur H
Vandenberg noted in his diary in April 1944, "anything but a wild-eyed internationalist dream of a world state.... It is based virtually on a four-power alliance." Eventually this proved to be both the potential strength and the actual weakness of the future UN, an organization theoretically based on a concert of great powers whose own mutual hostility, as it turned out, was itself the greatest potential threat to world peace.
Four Policemen - Wikipedia, the free encyclopedia
Each of the Four Policemen was to maintain order in its respective sphere: Britain in its empire and in Western Europe; the Soviet Union in Eastern Europe and the central Eurasian landmass; China in East Asia and the Western Pacific; and the United States in the Western Hemisphere.
Yes, China meant ROC in that sense, which was the "last man standing" versus Imperial Japanese aggression, not PRC which was established only at 1949 after a civil war on mainland. PRC succeed the seat from ROC, despite ROC still rules over a much smaller territory of Taiwan. Similarly, Russia succeed the seat from USSR. Hence that's PRC, Russia, US, UK and France as UNSC P5 today.