Honey, it's true. This is the Tmall store officially authorized by Xiaomi to sell Xiaomi accessories.
Please consult the official online customer service. /Services/Contacts
If you are using the computer now, please turn it on. (/c/service/? num=3)
If you have an APP of Xiaomi Mall on your mobile phone, please open Xiaomi Mall ~ Services ~ Drop-down ~ Online Customer Service.
Or call Xiaomi customer service directly at 400- 100-5678.
They can provide you with all kinds of information consultation.