皖 ㄨㄢ ˇ wǎn 南 ㄋㄢ ˊ nán 事 ㄕ ˋ shì 变 ㄅㄧㄢ ˋ biàn 皖 ㄨㄢ ˇ wǎn 南 ㄋㄢ ˊ nán 事 ㄕ ˋ shì 變 ㄅㄧㄢ ˋ biàn New Fourth Army Incident of 1940, involving fighting between the Nationalists and Communists