Ah.....the legendary MTU size issue....

Change the MTU size at your router configuration pages.
Either 1480, 1492 or 1452? Pick one.

EDIT:
Before that, you should really update the drivers first.

https://www.intel.com/content/www/us/en/dow...s-adapters.html

sifu can teach me how to access ROUTER CONFIGURATION PAGES?

Update your drivers first before you modify anything in the router. 

sudah sifu

So....what is your router model? 

ZTE

MODEL: ZXHN F620