69 years ago today, January 25, 1956 (Lunar calendar December 13, 1955), Chen Yun put forward a problem that needs to be addressed in the public and private joint ventures. January 25, 1956, Chen Yun at the Sixth State Congress, put forward several issues that need to be addressed in the public and private joint ventures: first, the whole industry public and private joint ventures are just the beginning, not the end; second, the small stalls, not employed by the store, should be distinguished from the policy of capitalist commerce, should be retained for a long time to operate separately; second, after the public and private joint ventures, the original production method, management method, should beined in a period of time, as the old.