Group 1 - The article discusses a promotional campaign by China Construction Bank (CCB) offering WeChat discount coupons starting from 0.99 yuan, valid from August 1, 2025, to December 31, 2025 [2] - Users can access the WeChat discount coupons through the CCB app by navigating to the "惠省钱" (Save Money) section and selecting participating merchants [12] - The article outlines the refund policy for the WeChat discount coupons, stating that full refunds will return the discount amount if the coupon is still valid, while partial refunds will return the discount proportionally [14][18] Group 2 - The article emphasizes the importance of updating the CCB app to the latest version to utilize the WeChat discount coupons effectively [7] - It lists various merchants where the WeChat discount coupons can be used, including Meituan, Tmall Supermarket, and Luckin Coffee [7][8] - The customer service hotline for inquiries regarding the discount coupons is provided, available daily from 9:00 AM to 11:00 PM [18]