Because Chai Biyun is a famous Chinese musician and singer who was born in Chengdu, Sichuan Province. The reason Chai Biyun is in Sichuan is because her birthplace and growth place are in Sichuan. Sichuan is a province in China with a rich cultural and artistic atmosphere that has produced many outstanding musicians and artists. Chai Biyun grew up and developed her musical talents in Sichuan, eventually becoming a high-profile musician.