How to install the driver of the Totolink wifi adapter(based on rtl88x2BU) on Ubuntu 20.10

Recently, I have assembled a desktop computer to practice my skills about deep learning. But I met a situation about I only have the wifi in my rented room and I bought a motherboard without wifi chipset.

Therefore I bought a wifi adapter "TOTO Link A2000UA" which use the Realtek wifi chip. But I installed my desktop with Ubuntu 20.10 system which is not supported by the Totolink public driver.

So I have to do some google search.
Thanks to the open source from kind person on the github.

https://github.com/MIBlue119/RTL88x2BU-Linux-Driver

Step0. In order to download the resource. Connect your phone that can connect to the telecommunications(4G/5G ) with your Desktop as the wifi source.

Step1. Download the source code from the github link.
ps: you have to confirm the chipset used by your wifi adapter and the ubuntu system version.

How to check ?
open terminal
(1) $lsb_release -a
That wil show the system version
(2)$lsusb
Please connect your wifi adpater first and key this command. You will get the chipset information.

Step2. Follow the step at the github page to install
https://github.com/RinCat/RTL88x2BU-Linux-Driver

Step3: Restart your desktop. Connect the wifi adpater and open "Settings>Wifi" , you will see the wifi source.