Wi-Fi, also known as "action hotspot", is a wireless LAN technology created in IEEE 802. 1 1 standard. Based on the close relationship between the two systems, some people regard Wi-Fi as a synonym for IEEE 802. 1 1 standard.

Hangzhou Library is a public library located in Hangzhou, Zhejiang Province. Founded in 1958, it is known as "the warmest library in history".