Dai Meng, also known as Diamond Dai, is an idol singer based in Shanghai, China. She is the former co-captain of SNH48's Team SII and a member of the SNH48 International subunit 7senses, who has promoted with in Korea. She joined SNH48 in 2012, successfully debuting in early 2013 with the stage "Give Me Power!", and has been active in the SNH48 circle ever since. In 2019, Dai Meng joined the Chinese survival show "Youth with You" with her fellow 7senses members Kiki Xu, Eliwa Xu, and Tako Zhang.

She graduated from SNH48 Team SII on October 14, 2020.