At
SJTU, Cai became roommates with
Liu Wei and Luo Yuhao. Cai and his roommates secured a (US$) grant from the Shanghai Technology Innovation Center's Eagle Program. It began as a literary open source community. Cai is the chairman of miHoYo, which by 2021, made over ¥10billion (US$1.4billion) in revenue. In May 2022,
New Fortune, a Chinese magazine, published the "2022
New Fortune 500 Rich List" ranking the 500 richest people in China. Cai made his first appearance on the list in 73rd place at
¥56billion (US$8.7billion). Among the first 100 people on the list, Cai was the only person who made his fortune in the Chinese video game industry. miHoYo responded to the press that Cai would "continue to devote himself to the research and application of cutting-edge technology, the development of new projects, and the connection of domestic and overseas R&D resources." In late 2023, Cai announced the formation of Anuttacon, a California-based startup company, which would later announce its first game, titled
Whispers from the Star, in 2025. == Family ==