Xu Mengjie (徐梦洁), also known as Rainbow (彩虹), is a Chinese artist under Zhumei Tao Culture. She is currently a member of the Chinese girl group Lady Bees and Produce 101 China project group Rocket Girls.
- Real Name: Xu Mengjie (徐梦洁)
- Nickname: Rainbow (彩虹)
- Korean Name: Seo Mong Kyul (서몽결)
- Birthdate: June 19, 1994
- Birthplace: Jinhua, Zhejiang, China
- Blood Type: AB
- Height: 166cm
- Weight: 50kg
-  Produce 101 China
- She placed 11th on Produce 101 China with 83,772,852 votes.