BPI-R4，how to get in mtk factory test mode

Banana Pi Router design BPI-R4/BPI-R4 Pro(MT7988)
1

How to get in factory test mode?

input:
mwctl phy0 e2p 1af =1 
result:
0x0000  
The commond ‘mwctl phy0 e2p 1af =1’，should return 0x0001
2

you need install MTK vendor wifi driver image, you may contact the mtk vendor and get the document about ate and QAtools commnad. then you can debug the wifi.