Introduction to the old house: The Wu family is the first clan of Mingyue Bay and has the largest population. Wu Di, the founder of Qishan, was the second son of Wu Lin, a famous anti-Jin general in the Southern Song Dynasty. During the Jiatai period of the Southern Song Dynasty (1201-1204), he moved from Sichuan to Mingyue Bay to avoid disaster. He changed his name to Wu Xian, with the courtesy name Yunhe, and moved to Mingyue Bay for the Wu family. The ancestor of the mountain.