Dressed in dark blue jeans and a light yellow T-shirt, Chau Pham Duc Hao, a student from Vietnam, looks no different from a Chinese student.

• 穿著深蓝色的牛仔裤和一件浅黄色的T恤，周范德豪，一位来自越南的学生，看起来和中国学生没有两样。