"Sanfu" sent me a text message saying that they charged 30 yuan to my membership card. I wonder if I can use it? How to use it?

Hello, Sanfu Department Store has added a 30 yuan electronic coupon to your membership card. This 30 yuan coupon includes 20 yuan for men's and women's clothing. You can buy regular-priced goods in men's and women's clothing and you can get it immediately. 20 yuan off, and there are 10 yuan left. You can buy regular-priced goods in the accessories area and underwear area to get an immediate discount of 10 yuan. This event ends on October 7, and you can use it as long as you have an electronic coupon in your membership card.