My Mini-me and Me.

Zhang Zhendong gets a knock on his door from his 12-year-old self from the past. His life is thrown into complete chaos as he struggles to play parent and hides the identity of his mini me from his neighbours. He fumbles on a journey of self-discovery and second chances as he attempts to fight for love and youth that he's lost along the way whilst figuring a way to send his mini me back to 1999.