Why doesn't China Railway recruit an only child?

There is no rule not to recruit only children.

There is no rule that China Railway does not recruit only children. Some occupations of China Railway are more dangerous, and there are certain restrictions on recruiting only children. However, the company did not explicitly stipulate that only children should not be recruited.

The recruitment requirements of China Railway are bachelor degree or above, and each position requires different majors. The recruitment targets are fresh graduates who are included in the national enrollment plan and fresh graduates from full-time colleges and universities.