Wired router (modem), wireless router, IPTV and other shared Internet settings

I have a desktop computer at home, and then I have a laptop. I installed China Telecom's 4M broadband.
Previously, I used a wired router as a modem, and only my desktop computer could access the Internet and watch IPTV. But sometimes you need to access the Internet with your laptop and desktop at the same time, so you prepare to set up a wireless network. So I bought a TP-LINK wireless router. The following is the installation process for reference by students in need.
equipment:

One wireless router, one wired router (used as a modem, not using the routing function) or one modem or hub

process:

1. The broadband is directly connected to the wired routing LAN port. (Do not connect to the WAN port of the wired router)
2. Connect the cable of IPTV set-top box to the wired routing LAN port (you can watch TV directly).
3. Connect the desktop computer to the wired router LAN port via an Ethernet cable (you can directly dial up to access the Internet).
4. Connect the wireless router WAN port to the wired router LAN port. Set the wireless router IP to 192.168.2.1 (to avoid conflict with the IPTV default 192.168.1.1) and set up a broadband account.

In this way, desktop computers, laptops, etc. can share the Internet.