Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (379.99 USD): BGCWA9T5
Coupon (379.99 USD): BGCWA9T6
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGCWAOP1, BGCWUP1, BGCWAOP2, BGCWAOP3, Email5, BGCWAOP4, BGCWM301, BGCWAOP5, BGCWMAX4, BGCWAOP6, BGCWAOP7, BGCWAOP8, BGCWAOP9, BGCWAEP5, BGCWABP1, BGCWAEP6, BGCWA8YP, BGCWA8EP, BGCWA8GS, BGHALLOWEEN, 7d18f7, BGCWA8G9, BGCWA9T1, BGCWNY2, BGCWA9T2, BGCWABS5, BGCWA9T3, BGCWA9T4, BGCWA9S
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for CHUWI AeroBook Pro M3-8100Y 8/256GB Notebook.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).