Building 19 is a large-scale community forum website in Hangzhou, which has now covered many cities. The building in Taizhou is called Taizhou 19.

As for why it was called19th floor, it is said that the founder of the website lived in the19th floor of a residential area in Hangzhou. At first, it was a small forum website, and all the participants were interested in building a floor and a community, so the website was named after the floor where they lived.