Aliexpress
Click here… to search for Xiaomi MJTD01YL Smart LED Desk Lamp on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): xiaomi566, mitable, e2bcea, TTxBG10, BGoutravelLED, BGss506, AFfbG10, BGaDmITAd, 7d18f7, BGCITYADS2019, BG10OFFAFF, BGwhielabel, 13f142, BGLIG12, BG10OFFAFF1, BGd0b05d
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi MJTD01YL Smart LED Desk Lamp.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).