Residence introduction: Yundingchang still retains a strange and mysterious "morning market" custom, also known as "ghost hunting". That is to say, at three or four o'clock in the morning on the third, sixth and ninth days of the lunar calendar, the lights are brightly lit for buying and selling in the distant mountains and near the ridges, under the street eaves, and the lights disappear at about six or seven o'clock in the morning.