https://thediplomat.com/2014/09/the-ccp-didnt-fight-imperial-japan-the-kmt-did/

https://history.stackexchange.com/questions/38266/did-mao-zedong-and-chinese-communists-collude-with-the-japanese-during-the-sino

https://nationalinterest.org/feature/chinas-communist-party-japan-forgotten-history-10533

http://www.chinauncensored.com/index.php/real-china/614-communist-mao-welcomed-japan-invasion