Wu Sijia was born in an ordinary family in a small county town of Langfang, Hebei Province on October, 2003. Sijia is the youngest child in the family. Two older brothers got married. Sijia showed her dancing talent when she was two years old. When she was three years old, she accompanied her cousin to dance classes. She was discovered by her teacher. After studying dance for two weeks, she reached the level that other children had studied dance for two years. At the age of four, she won the gold medal of children's dance major in the TV selection activity of national outstanding young artistic talents in colorful sunshine. During the 2008 Olympic Games, five-year-old Jia Jia participated in the "New Silk Road Model Contest" and won the third place in the talent show. Jia Jia is not afraid of life and works hard. Everyone who met her liked it very much, especially Jia Jia's teacher. During Jia Jia's dance lessons, the teacher overheard Jia Jia singing and found that Jia Jia's timbre and intonation were very good. She began to train Jiajia to learn vocal music, erhu and guitar. The school is far from Tianjin, and the course is once a week. Because I am far from home, I start early every morning and get home at midnight every night. At first, the family didn't quite understand and objected, because Jia Jia's parents were older, and the two brothers were worried that their parents' body and energy could not support them. However, Jia Jia's mother didn't want to destroy her child's talent, so she reached an understanding with her father and stuck to it until now.

In 2007, Jia Jia participated in the "Colorful Sunshine National Youth Excellent Artistic Talents TV Selection Campaign" and won the gold medal in children's dance major, from which her acting career began. Because Jia Jia is still at school, the family is worried that Jia Jia will neglect her studies in the cultural class, and she is not allowed to participate in various programs too much. For this reason, I also turned down various invitations. Until 20 10, Jia Jia's study was not delayed by the performance. Jiajia's mother can rest assured that Jiajia will pursue her dreams. "Robot" Dance recorded by Tianjin TV Station. This is the Spring Festival Evening program broadcast by CCTV Children's Station. This made the little street dancers fall in love with the TV screen, a stage to show their elegance, and participated in the programs of Shenzhen Satellite TV's great artists, BTV's extraordinary show, natural talent, stone scissors and cloth, and Lu Yu's appointment. On the stage, Wu Sijia showed his unparalleled dance charm. This lovely elf, still a kid, gradually fades out and flies in the world of dance.