你要做的最重要的一件事是：让在这边的同学，去学校Registrar's Office开一张 Student Status Letter(to certify that you are currently a registered student in the institute. This certificate should include a NUS/NTU official stamp)，把这个东西寄回去。拿着它去新加坡驻华大使馆办签证。要照片数张，签证费120人民币。护照有效期至少半年。