Sovereign to a country in
civil war. Revisit the definition since you are evidently oblivious, and in particular its context within international politics.
Now you come to the point: the recognition was an act of pure Cold-War geopolitics and sought to undermine the flow of the Communist tide in a large and populous nation, even though the
de facto government of that nation was nothing else. Again, to entrust a (perceived) de jure government of a nation-state with a responsibility of such gravity as a seat on the Permanent Security Council was nothing but political expediency, and did not represent nor levitate upon any fulfilling of nominally circumscribed preconditions to that extent.
Your point- an inane one- centres upon the distinction between 'conventional warfare' and 'guerilla warfare'. It is a poor one. To boot, it also detracts from your previously asserted position of the KMT's 'contribution' to the Allied victory as ostensibly juxtaposed with the Communist one. Chiang Kai Shek also held the policy throughout of dealing with domestic insurrections first and then with external threats, and to that end had to be kidnapped by his generals to arrive at the negotiating table.
Again, the KMT's successes were far less, and their exploits far more insignificant than the CCP's victories borne of 'guerilla tactics' over 'your' forces during the War.
Chinese Communist Party -Mainstay of the War of Resistance Against Japan (July 1937-August 1945) - Jongo Knows - Encyclopedia of China
The Rise to power of the Chinese ... - Google Books
People's Daily Online War of Resistance Against Japan (1937-1945)
Verbatim: Hence to boot: "Despite the rural context within which the Communists were fighting the Japanese War of Resistance, Mao referred to the proletariat in April 1939 as the "vanguard in resistance to Japan", and in July 1939 as the "backbone" of the Anti-Japanese United Front."
Rethinking Mao: explorations in Mao ... - Google Books