《Unknown》Adapted from Jinjiang literature author Priest《Big Brother》, directed by Jiang Ruizhi, starring Qiu Yuchen, Huang Hongxuan, Yang Ziyi, Zhu Youcheng, Wei Qian and Wei Zhiyuan's story.

The plot revolves around the tangled emotions between his elder brother Wei Qian and his unrelated younger brother Wei Zhiyuan who raised him.“I decided to rely on you and follow you home, and we became brothers.Looking at your back, trying to catch up with you, the whole world starts to revolve around you.You are my brother, but you are not my brother, why can't I like you?”

Qiu Yuchen plays Wei Qian.Since childhood, he has shouldered family responsibilities, taking care of his younger sister, and unexpectedly adopted his younger brother Wei Zhiyuan.

Huang Hongxuan plays Wei Zhiyuan.After he was picked up by his elder brother when he was wandering on the street, he only had eyes for his elder brother.