25 years old. Mr. Hei, a 25-year-old graduate from Jiaotong University in Huangpu District, Shanghai, usually shoots drama videos in Tik Tok. Professional illustrator, graphic designer, graffiti artist, art test design teaching lecturer, founder of black workshop hand-painted studio, and head of Rubik's cube design teaching. Author of books such as Design Strategy, Design Practice and Hey, Design.