How did the communist party win during Chinese civil war?

The Communist Party of China (CPC) won the Chinese Civil War through a combination of effective guerrilla warfare tactics, strong grassroots support, and strategic alliances. They capitalized on widespread discontent with the Nationalist government's corruption and inability to address social issues. The CPC also benefited from the support of the Soviet Union and successfully mobilized the peasantry, which constituted a significant part of the population. Ultimately, the Nationalists were weakened by internal strife and military defeats, leading to their retreat to Taiwan in 1949.