Datang Gong Tea House is located in Gulu Mountain, Changxing, built in Tang Dynasty five years (770). It is the place to supervise the construction of Gong Tea, Gulu Zixuan Tea, and can be said to be the first tea processing plant in Chinese history. The Zixuan Tea, which is produced in Gulushan, Changxing, is the Gong Tea of Tang Dynasty.