Aliexpress
Click here… to search for Huawei M6 Turbo Edition CN WIFI 6/128GB Tablet on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (504.59 USD): 7d18f7
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGa66262, bgchinafest, BG8ba741, aff7off, BG04e54f, BG99ee28, BG57098a, Email5, BGabfe1a, bgshOOp10, BGAFF10OFF
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Huawei M6 Turbo Edition CN WIFI 6/128GB Tablet is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).