Why do many companies require boys to be1.8m tall when recruiting?

It is inconvenient to bend over to work. In daily life, the height of girls is basically between 150cm- 170cm, but some girls are taller than boys and stand out in the crowd, but sometimes being too tall is not necessarily a good thing. When a girl in Hangzhou applied for a children's art teacher, she was rejected by the employer. Girls don't want to ask why employers are eliminated. The HR of the recruitment directly said: "185 is too high, and it will be very tired to bend over to work often." This sentence seems to be considered for girls, but it is actually an "invisible threshold." These "hidden discrimination" should not exist at all. They will not affect students' work attitude and ability. The most important thing is personal factors. Because I care about gender, height and other issues, I can clearly express it when recruiting. Don't waste students' time in finding jobs. Many students were expecting before the interview, but they were rejected by the employer on the grounds of "hidden discrimination". This is really unfair. Reject "invisible discrimination" and eliminate the job market. When it comes to "hidden discrimination", the most common ones are age discrimination and gender discrimination. Many units prefer to recruit male employees, although it is not explicitly stated. The main reason is that women have marriage leave and maternity leave. And the stability is not high, and the benefits to the enterprise are relatively small, so I don't want to choose female employees. In addition to the problems of the enterprise itself, there are also reasons for job seekers. Some "unscrupulous" job seekers, under the guise of employment, actually want to find a company to take maternity leave.