Wechat is the best known messenger service in China. More than 900 million users have installed Wechat Messenger. The Messenger service was launched in China in 2011 and over the years the chat function has been expanded with numerous additional services. WeChat Pay is comparable to the QQ-Wallet. With WeChat Pay the user can pay for a variety of services in China directly on the move. A QR code is used for contactless payment. To pay, the user has to open the WeChat app and generate a QR code that is scanned by the seller. The QR code is generated every 60 seconds, the amount of the purchase is confirmed by the customer and the buyer and seller receive a confirmation email. If desired, the seller can also print out a receipt.