Group 1 - The article promotes a discount campaign by China Construction Bank, offering WeChat discount coupons for fuel purchases at Sinopec stations, with a maximum discount of 10 yuan for a single recharge [1][8]. - The campaign runs from September 30, 2025, to December 31, 2025, encouraging customers to refuel their vehicles [1]. - Users can access the discount by navigating through the "China Construction Bank" app to the "Hui Sheng Qian" activity page and selecting participating merchants [15]. Group 2 - Refund rules for WeChat discount coupons are outlined, stating that full refunds will return the discount amount if the coupon is still valid, while partial refunds will proportionally return the discount [18]. - The "Hui Sheng Qian" savings card is non-refundable once purchased, and any unused coupons will not result in a refund of the card purchase price [19]. - Customer service is available for issues related to the savings card, with a hotline provided for assistance [21].