Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (128.34 USD): BG4ee866
Coupon (141.93 USD): BG00c906
(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): BG2XMFG, 7bcdf9, BGSGD2, BG10OFFAFF, BGwhielabel, BG140d74, BG10OFFAFF1, BANGGOODSD, BGHealth06, 00c906, BG01292a, BG89ce73, BGef8234, BGHealth10D, 2022ACTIESNL, BG84b0d5, BGAlerabat1, BGHB218, BG585f5d, BGfeeffe, 2203ActiesNL, BGHECARE1
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Xiaomi Mijia Massager MJJMQ01-ZJ is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).