Zheng Siwei (first from the left) was born in Wenzhou, Zhejiang Province in February 1997.

In 2017, he won championships in badminton mixed doubles at the China Macau Open Badminton, the Badminton China Open, and the BWF Super Series Finals. In 2018, he won championships at the BWF World Tour Malaysia Open and the BWF World Championships. In 2020, he won the championship in mixed doubles at the National Badminton Championships.

On July30, 2021, Zheng Siwei and Huang Yaqiong as a pair won the silver medal in mixed doubles at the Tokyo 2020 Olympic Games.