Introduction to Yimen: Yimen, also known as Saimen or Ermen and Hu. It is a gate tower made of water-milled bricks with exquisite craftsmanship. The angs and brackets are all made of ground green bricks and connected with brick tenons, showing exquisite craftsmanship. The left and right door covers are engraved with the words "De Zheng Ying He" and "Golden Chui Ji" respectively. On the belly of the pocket are engraved four bats (blessings) pictures of four bats holding longevity, the four gentlemen of plum, orchid, bamboo and chrysanthemum symbolizing elegance and elegance, and " Stories about characters from the Three Kingdoms such as "Liu, Guan and Zhang Taoyuan were sworn brothers" and "Guan Yu hangs a seal to seal the gold". The bricks and squares are engraved with three figures of fortune, wealth and longevity and the Eight Immortals of Darkness. The carp jumping over the dragon gate carved on the lower square is even more lifelike. , symbolizing the joy of passing the exam. A pair of stone carvings holding drums in front of the door have the pattern of three lions playing with a ball. The two black-painted nanmu doors and the 70-centimeter-high threshold hint at the Mo family's distinguished family background. The ceremonial door is usually closed, but is only opened during important family ceremonial events or when distinguished guests come to visit, as a sign of respect.