Aliexpress
Click here… to search for Xiaomi RedmiBook Pro 15 2022 Laptop 15.6inch 3K i7-12650H RTX2050 16/512GB on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (1429.99 USD): BGfe0705
Coupon (1499.99 USD): BG3fd3fd
Coupon (1546.99 USD): BGJUNEGSG9
Coupon (1563.99 USD): hoNEYbGdeAlS
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): 8Couponsde, BG1e1478, MVC8SPRING, 8BGwbg2204, BG84ce8f, BG3a44da, BG333636, tRaDetRaCKeR, BG758c8e, 8wEbgaInS5, BG5649aa, pROMo8cuPoN, BG6b33e1
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi RedmiBook Pro 15 2022 Laptop 15.6inch 3K i7-12650H RTX2050 16/512GB.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).