I know nothing about this kid Yu, but there have been a number of skyscrapers over the years who have played limited minutes and signed with small or mid-major programs. I'll catch a short video of a giant at Western Kentucky and wonder how he ended up there, only to see he averages 5-15 minutes a game. Probably a question of size vs. skill, fitness, and health?
Remember 7'7" Kenny George from Chicago who played at UNC Asheville?
We've been so lucky to have in Kofi a big who stays on the floor and gets better week by week to where he possesses the skillset he currently has!