What is the largest number of gold medals won in one day in the history of China?

August 2008 17 was the most, with ***8 pieces:

August 17 Qiu Jian [Shooting] Men's 50m Step Three Postures

August 17 Tang Bin, Jin, Xi Aihua,

August 17 Wang Jiao women's freestyle -72kg.

August 17 Zou Kai [Competitive Gymnastics] Men's Floor Exercise

August 17 Xiao Qin [Competitive Gymnastics] Men's pommel horse

August 17 Guo Yue, Zhang Yining and Wang Nan [Table Tennis] Women's Team.

August 17 Dānlín [badminton] men's singles.

Guo Jingjing [Diving] Women's 3m springboard