Launched by WeChat in January 2017,
小程序 became a defining feature of China's super-app era: sub-apps that run inside WeChat (later Alipay, Douyin, Baidu) without installation. 'Use and go' (
用完即走) was Zhang Xiaolong's original pitch. Today restaurants, shared bikes, government services, and most QR-based interactions in China run on them.