Why can't I log in to Clap Clap Catering? There is a problem with the network that causes the background to get stuck. Refresh the network to re-login can. Clap Clap is the first domestic catering O2O e-commerce ordering platform, is in the original more to book the website after the upgrade optimization of the new platform. The platform provides consumers with online reservation, ordering, payment of one-stop convenient service.