1, male 170cm and above, female 160cm and above.

2. Weight: Male body mass index (unit: kg/ m2) is between 17.3-27.3, and female body mass index is between 17. 1-25.7.

3. Vision: The naked eye vision of both eyes is above 4.8.

4, color vision: no color blindness, weak color.

5. Appearance: no baldness, no thoracic deformity, no scoliosis and hunchback, the distance between the medial condyle of femoral genu varum and the medial condyle of tibial genu valgus is less than 7 cm, no flat feet with completely disappeared plantar arch, and no obvious scars (such as trauma, burns, scars, birthmarks, etc.). ) On the exposed parts of the body, there is no varicose veins of the lower limbs, no bromhidrosis, and the same sex. Physical examination is the abbreviation of physical examination, which refers to the physical examination of the subjects through medical means and methods, and is one of the effective means to prevent diseases.