Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Color: Black, with intelligent chip, Integral knitted upper, Shock-resistant EVA midsole, With TPU balance patch and reflective stripe at heel
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Sneakers Black.
Price records source(s): Gearbest
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).