Introduction to Qianlong's imperial pen: Directly above the main entrance of the mountain gate, the green bricks are inlaid with seven gold-plated characters "Edict to build Anlan Longwang Temple" written by Emperor Qianlong's imperial pen and a seal of "Qianlong's imperial pen". Both sides of the Zen Gate are connected to the inner palace wall. On the palace wall, there are two opposite "foot gates" with two light and two dark sides, also known as "bianmen". Legend has it that it was the passage for the emperor and civil and military officials to enter and exit the palace.