If you are wondering who are the highest paid kids celebrity in China here the 4 most expensive actress (the eldest is 12 years old).
Angela Wang 王诗龄
Birthdate: October 13, 2009
Work: The man from Macau II, Where Are We Going, Dad?, Happy Camp, Girl of the Big House
Note: She has a fashion brand for children in New York, she walked the runway for Ralph Lauren in 2014. She is the daughter of Chinese reality tv star Li Xiang
Zihan Ji 纪姿含
Birthdate: October 9, 2007
Work: Tiger Mom, Ice Fantasy, The Breakup Guru, Chinese Paladin 5, Happy Together, Tiny Times 4
Cindy Tian 田雨橙
Birthdate: April 15, 2008
Work: Monster Hunt, Emperor's Holidays, Where Are We Going, Dad?, Happy Camp
Note: She is the daughter of actor and former diver Tian Liang and singer Yiqian Ye
Zhang Zimu 张籽沐
Birthdate: January 6 , 2008
Work: Ice Fantasy, The Assassins, Shuttle Love Millennium, Legend of Fragrance, The Deathday Party, The Grandmaster, Noble Aspirations, Women Must be Stronger, The Imperial Doctress.
Note: She made her first appearance (The Grandmaster) when she was 2 years old
P.S. Unfortunately we don't have exact info on how much each of this child make.