微信支付 (WeChat Pay): WeChat Pay is another widely used mobile payment platform in China that operates within the WeChat app.
二维码 (QR code): QR codes are scannable barcodes that contain information such as payment details. They are commonly used for making payments through platforms like Alipay.
手机应用程序 (mobile application): Mobile applications, or apps, are software programs designed to run on smartphones. Platforms like Alipay and WeChat Pay are accessed through mobile apps.