Just fill in the account number and password of the network card in the newly bought router. If not, write down the mac address of the previous router and clone the mac into the mac of the previous router in the new router. If not, use the previous router, and then connect a LAN port of the newly purchased router with a LAN port of the previous router. Just plug the computer into the LAN of two routers. So you can connect 10 computers. In fact, you should have bought a wireless router from the beginning, which saved you the trouble of changing the router.