Handan. Com belongs to a group buying website that combines group buying and sign-in. Handan. Com is the world's first Groupon and Foursquare (group purchase+sign-in) group buying website. Founded in March of 20 10 and 18, it is one of the largest group buying websites in China, serving more than 400 cities, and the transaction volume in 20 10 is close to 10 billion yuan. Handan. Com launches ultra-low-priced boutique group purchases every day, so that users who participate in group purchases can enjoy quality services at attractive discount prices.