Many mums here teach them back to back. Children don't get confused. They are much smarter than us
Doing all of them back to back is quite a long time to expect a child to focus, perhaps consider a break halfway through. However each child Is different and some will happily sit there actively watching for that long.
Ekari, did you mean you are interested in the Chinese curriculum for little reader? It is for sale online here in the shop. It teaches Chinese language and reading of charters as well.