Introduction to Taizi City: Taizi City south of Black Dragon Pool is actually a peak with an altitude of 4816 meters at the junction of Mianzhu, Shifang and Maowen counties in Deyang. It is also the highest among the Feilai peaks in the Longmen Mountain area. A mountain with many mysteries and legends. It stands at the top of Feilai Peak Group in Longmen Mountains with its unique grace. It is of great value in the study of the seismic zone surrounding Longmen Mountain and the formation of Feilai Peak. Looking at Prince City from a distance, sometimes it sparkles with gold, sometimes it sparkles with silver, so there is also a legend that there is gold and silver everywhere here.