QT coupons can be exchanged for skin, and there is a time limit (specifically, you need online time every day when you get off QT)
There is also a mystery shop activity, which is usually preheated in advance and given a few discounts on keys. If you are lucky, you can get a discount of 1.2.
There is a lucky summoner's activity every month. Generally, the lucky draw will only be held after 16 every month, and qualified viewers will get a 10% discount.
There are also official anniversaries or other large-scale activities. For example, some time ago, five blacks sent permanent skin. This product is rarely delivered within the time limit.
During the Chinese New Year or the holidays, we sometimes buy the skins of reconnaissance guards and draw prizes.
5 RMB, 10 RMB, giving away a lot of garbage permanent skin at one time (recommended by civilian players).
There is also a mysterious gift, which was only given once last spring.
17.5 Give a friend a random skin with a hero.
The probability of providing 129.99. 199 is extremely high, but it is gone now!
I have completed all the official activities of skin. I never pay attention to third parties. I'm not that lucky anyway.