In no way do I believe Sui He is using her hair to cover up her face. Ever thought it was her agent's idea to have her hair long, sleek, and parted in the center?
Whenever I see Sui He in photos and videos, she radiates and couldn't look anymore confident in front of the camera.
To what is the actual reason do she like to do her hair that way, i think only she and her agency knows or maybe fashion insider. 
