How some(wechat) apps ignore fake location then detect real?

I have installed a fake location app and set my location different. Then opened Google Maps and Wechat app,

• Google Maps shows my location as what i set(fake)
• Wechat app ignores fake location and detects real location (how ?)

Then i wanted to prevent wechat analyze my previously received real locations and new fake location.

• Uninstalled Wechat
• Restarted my device
• Set my location as fake
• Installed Wechat again

But same result, it detects my real location.

I really want to understand how they do this. Any idea ?

EDIT

What i'v tried ?

• Gps provider spoof
• Network provider spoof
• Fused location provider spoof
• IP geolocation spoof
• Gps provider spoof + IP geolocation spoof