Introduction to Jinsi Gorge: Seven stone pillars at different heights form the main body of the gate. The overall shape is three "mountain" characters. Because "three" and "mountain" are homophonic, the sum of three and three is six, and the multiplication of three and three is Nine, three, six and nine are Taoist auspicious numbers. Three, six and nine moving upward means that the development of Jinsi Gorge will be prosperous and lasting.