As a famous military academy in China, National University of Defense Technology has certain requirements for students' hairstyles. According to the regulations of our army, the hair of male students should be neat and orderly, and the hair length should meet the following standards:

1, the length of the hair on the top of the head shall not exceed 2cm;

2. The hair length on both sides should not exceed the bottom of the earlobe;

3, the back of the hair length shall not exceed the collar. Female students' hair requirements are relatively loose, but they also require neatness and order. The specific requirements will vary according to different grades and student status. I suggest you pay attention to the official regulations of National University of Defense Technology or consult relevant departments for details.