Don't buy if you can't read Chinese. The app you need is an app within the we-chat app feed is only in Chinese. For we-chat you need an account that is verified by a friend with we-chat. Seller said they could help me to verify my account, but they don't. They even don't read my messages and my email anymore. I've opened a dispute, but aliexpress says the product is good so no reason for refund. Now I have a purification that I can't use because I cannot sign in to we-chat, cannot download the other app wich I need to operate the device and even if I could it is only in Chinese. Thats not in the description. So now you know. If I knew that, I wouldn't have bought it because I don't read Chinese.
Even aliexpress approved the way this seller does business. So don't buy if you are not in China or do not have a we-chat account