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1. Buy another wireless router and set it to the forwarding mode and relay it between the living room and bedroom. A wired connection between the two units is also available.
2. Self-made antennas with hands-on ability.
WiFi signal enhancement basically needs to be achieved by hardware, and a wireless wifi needs to be added and installed in the computer room.
You can put a can on the antenna to let him reflect the signal, or buy a high-powered router.
Buy an antenna to strengthen the signal.
If you want a good signal and only want to install a route, I recommend buying a wall king or AP, both of which are very good, covering a wide range and having a good effect on the wall. The price is also ok, not very expensive. Ask the landlord to adopt it.
Trunk or bridge can be. You can try it yourself, I tested all the modes.