Hub, for which the total investment is 400 million, is in charge of the network system of the teaching buildings in Tsinghua Academy of Fine Arts. The front-end of the network system is connected to the Tsinghua backbone with a two-circuit, 10 Gigabits multi-mode and multi-core optical fiber, and linked to the terminal switch with Gigabit fiber, so each information port can achieve 100mb flow capacity. The teaching buildings are equipped with over 2000 100mb fixed network. The scope of an infinite network is up to 100m around the teaching building. HUB room is equipped with dual power supply and 60KW uninterruptible power supply protection and with separate double copies of backup for air conditioning system, which can ensure the equipment to run 24 hours a day.