Aliexpress
Click here… to search for Chuwi Hi9 Air CWI546 X23 4/64GB Tablet on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (140.00 USD): BGBFH9A
Coupon (144.99 USD): BG834c58
Coupon (159.99 USD): 16d1ef
Coupon (167.39 USD): aff7off
Coupon (167.39 USD): bgchinafest
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): c0fb46, 518b5b, e9f6fe, FE68C1, fe68c1, 8ae2a4, 55f5ac, 3b9a14, a0ba42, AlibuyHi9a, f32369, abba84, 54fb7e, bghi9air, 14f79b, b9e893, BGcwhi9, BGChuwiH9, BG4e008a, BG8d6972, BG7CWtab, BG9a89d1, BG7CWH9A, BG9a928c, BG5afb7c, BGReHI9A, BGc44ea1, BGd1f13e, BGHI9PL, BG9CWH9, BG93a168, BG14e06d, BGd06cc2, BG1953ce, BG38acb1, BGOCH9A, BGeff424, BG74ca98, BG8922ef, BGe1dc10, BG11H9A, BGe16abb, BG215d4b, BGBF64GH9A
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Chuwi Hi9 Air CWI546 X23 4/64GB Tablet.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).