Common unqualified items: ① Non-fresh candidates, unqualified; ② Those who are over 20 years old (that is, born before 1 September 19931) are not qualified; ③ Male height 162cm or less, female height 160cm or less, unqualified (measured net height after taking off shoes); ④ The naked eye vision of one eye is less than 4.5, and the non-command major is unqualified; The naked eye vision of one eye is less than 4.6, and the command major is unqualified (candidates stand at a distance of 5 meters from the eye chart, cover one eye with an eye patch, and check both eyes alternately); ⑤ Red and green are weak, color blind and unqualified.