Introduction to the old site of the small building: The old site of the small building corresponds to the "Young Master Building" in "Dong Zhonglai". It was once a two-story small building and was the residence of Mou Zongkui's son Mou Yu. In 1939, the great traitor Liu Guitang (nicknamed Liu Heiqi), instigated by the Japanese invaders, broke into Mou's manor with thousands of puppet troops and demanded property from Mou Yu, who was seriously ill. The building was reduced to ashes, and Mou Yu also died in the fire.