Introduction to the mountain gate: The brackets of the ancestral hall and the five diagonal brackets are stacked on top of each other and protrude forward; a wide plaque with the name "Yu's Ancestral Hall" hangs between the upper and lower squares. The upper flower square is carved with the pattern of "two dragons playing with pearls", while the lower flower square is carved with the pattern of "two phoenixes rising to the sun". The two opposites form a beautiful picture of "dragon and phoenix presenting auspiciousness". The flower houses in the middle and second rooms of Qimen Liang are respectively carved with distinctive themes of figures, gardens, flowers, trees, pavilions, birds and animals.