|Born||29 May 1991|
|Women's World Champion||2017-2018|
|FIDE rating||2511 (July 2019)|
|Peak rating||2530 (August 2018)|
In 2011, she won the women's chess tournament at the 2011 Summer Universiade in Shenzen, contributing to China's team gold medal. Tan won the Women's World University Chess Championship of 2012 in Guimarães. In 2013, she won the 3rd China Women Masters Tournament in Wuxi with a score of 6.5/9 points, 1.5 ahead of runners-up Valentina Gunina and Huang Qian. In 2014 Tan won the Asian Women's Blitz Championship in Sharjah.
In May 2015 she won the Chinese Women's Chess Championship in Xinghua. The following month, Tan won the 5th China Women Masters Tournament with 7/9, a full point ahead of second-placed Lei Tingjie. In August 2015, she won the Asian Women's Rapid Championship in Al Ain. On December 1, 2015, Tan Zhongyi won the 1st China Chess Queen Match, a knockout tournament held in Taizhou, Zhejiang, after defeating Ju Wenjun in the final in an armageddon game.
She reached the final of the Women's World Chess Championship 2017 against GM Anna Muzychuk. They finished the classical games 2-2 with one win each, sending the match to a rapid tie-break. Tan won the two-game tie-break by drawing the first game with Black and then winning the second game with White, and thus became Women's World Champion. This also earned her the title of Grandmaster.
She graduated from university in 2013.