Excuse me, why is my stable version of Xiaomi MIUI9 not compatible with WeChat, and the mobile phone prompt is not suitable for Xiaomi mobile phone?

Xiaomi is not authentic, obviously an old model, and WeChat suitable for new models is provided in the app store. Due to the low system and hardware, old models naturally cannot use WeChat. This is what I asked Xiaomi customer service to solve. Xiaomi refused to correct even after the complaint was reported on the 123 15 platform. I initiated an individual complaint in Black Cat, and I hope everyone can participate in the collective complaint.