You have to transfer your visa to your new passport.

If the old visa is ok, and the old passport is clearly still yours, then the normal international arrangement is that you carry thge old passport with the visa in it and it will be valid.

There is no way you can transfer a new visa from one passport to another, if ypou try to move it physically you will get into real problems, (I was advised by a UKMN Immigration official not to use any glue to restick a Chinese visa which had become detached as it could suggest a fake visa or pasport). China does not offer a facility to transfer a visa, ie issue a new sticker, you wpould have to apply fore a new visa if you don't want to carry the old passport.