Because early Party records are incomplete, and many participants faced significant changes such as sacrifice, leaving the Party, or defection, by October 1, 1949, only two delegates from the First CPC National Congress were still in the Party: Mao Zedong and Dong Biwu. Mao Zedong became the Chairman of the CPC Central Committee, and Dong Biwu later became Chairman of the People's Republic of China.
To this day, the exact start and end times of the First CPC National Congress are not fully known due to the lack of direct witnesses or evidence. What we know is that the meeting started on the evening of July 23, 1921, around 7:00 PM or 8:00 PM, was interrupted by French Concession police on July 30, and then moved to a boat on Nanhu Lake in Jiaxing in early August, where it finished. Recent studies suggest the Nanhu Lake boat meeting likely took place on August 3 and ended on August 4.