How my child can stay in China legally?

Hello guys, my wife and I are Ghanaian Citizens. We have just got a new born baby in China. The baby has been issued a birth certificate in China. what should we do first to ensure the baby living legally in China. Do we need to take the baby to a local police station for temporary registration?
Then also if we apply passport for the baby, it will take three months before we can get it. In this case, do we have any specified duration we must apply a visa for the new born baby or we can apply it for the baby at any time.
thanks