Sleeves should be 2.5 cm below the wrist. According to the personal library, it is known that the sleeves of bachelor uniforms are 2.5 cm below the wrist. A bachelor's uniform consists of a bachelor's hat, tassels, a bachelor's robe and hanging cloth. It is a formal dress worn by a bachelor's degree winner at the degree awarding ceremony, representing the degree obtained, and is one of the visible signs for the degree conferer to obtain a degree.