早在延安时期,毛泽东就曾说过,他是1921年农历五月廿九日(公历6月29日)从长沙启程,于7月4日到达上海。董必武也回忆说:“1921年7月,在上海召开党的第一次代表大会。”但俩人对开会的具体日期已记不清了。一份来自共产国际的档案则说得更明白:“代表大会预定6月20日召开,但各地 As early as the Yan’an period, Mao Zedong once said that he departed from Changsha on May 29 of the lunar calendar (29th of the Gregorian calendar) in 1921 and arrived in Shanghai on July 4. Dong Biwu also recalled: “In July 1921, the first congress of the party was held in Shanghai.” However, the exact date of the meeting for the two parties can not be clearly recalled. A file from the Comintern made it clearer: "The Congress is scheduled to take place on June 20, but around the world