How to use China Mobile e-gift coupons?

Is yours the kind of text message you received when applying for a new card? In that case, if you go to Hongqi Chain Store to buy something, the electronic gift voucher is usually 10 yuan! You just buy ten pieces of Devo stuff, and when you check out it says it’s an electronic gift certificate, just tell him your phone number and he’ll get it for you! But I tried it last time and ended up paying with cash. Then the salesperson will not be able to operate this electronic gift certificate. After trying for a while, it didn't work, so he asked me if he could use cash. The only option was to use cash! But you can try Hongqi Chain elsewhere! Let me explain that I am from Chengdu, and this is what we do here! I don’t know about other places! But the usage methods should be similar!