For example, one of Chairman Mao's most devastating tenets that still grips our nation today was the concept that the family is subservient to the state. The family exists to further the best interests of the state. The state, in essence, is God. All rights flow from it. All things exist for its benefit.
Children unfortunately are no exception.
Parents are allowed to keep children as long as their beliefs do not contradict those of the state. The state dictates the number. The state dictates what they will be taught and where. The state dictates where the children will eventually work and how much they will be paid. The state, in reality, owns the children.