$4 off $30: 5MAY4
$6 off $50: 5MAY6
$10 off $80: 5MAY10
$17 off $140: 5MAY17
$25 off $200: 5MAY25

Valid time (CET): 01.05 09:00 - 01.06 08:59 CET
Activity Landing Page: https://www.aliexpress.com/coupon.html 
Note: these codes are only for the products on activity landing page