Wang Ruihan was born in 2000. He is 23 years old and comes from Shenyang, Liaoning. Xin Er is two years old, and her mother is forty-five years old this year.

"My Little Tail" is a brother and sister growth observation companion variety produced by iQiyi, observing the life of brother and sister as a growth witness. The program takes the family emotional variety of "brother-sister relationship" as the breakthrough point, restores the pluralistic coexistence mode of brother and sister, and explores the mutual companionship and growth between brother and sister.