Alibaba Cloud CDN is a global network of servers designed to deliver high-performance, low-latency content to users around the world. It is a cloud-based service provided by Alibaba Cloud, a subsidiary of the Alibaba Group, that enables businesses to accelerate the delivery of their web content, including images, videos, and static files, to end-users.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Tengine is a web server which is based on the Nginx HTTP server.