Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (185.99 USD): od7off
(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): BGLZ64, aff7off
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Lenovo Z6 Lite 4/64GB.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).
GB coupon is too old and don’t work anymore.
Please update. Regards
Right now there is no other coupon