How does China stipulate that the elderly should move with their children?

There is no place for the elderly, and there is no rule that the elderly cannot immigrate!

But I don't understand what you mean when you say that all the formalities abroad have been completed, but China is stuck. Because the immigration procedures are prepared first and then sent to foreign immigration agencies for examination and approval, since the information is ready, it will naturally pass various domestic checkpoints. How can it be said that it is a card?