Why did you have to be 18 years old to work in a factory before, but now you only need 16 years old?

Our country's laws clearly stipulate that people who have reached the age of 16 can work, but they can only do some light work. This figure is preceded by child labor.

However, with the changes of society, more and more young people don't want to study, but just want to go out to work. Therefore, people of this age group have become a relatively affluent labor force, so the factory has lowered the standards.