Introduction to gray sculptures: On the top of a wall in the backyard of the former residence, there are lifelike gray sculptures carved. These gray sculptures are made by adding tung oil, clay, and glutinous rice to lime, then kneading them by hand, and then piling up the glutinous rice juice on the walls. These gray sculptures are originals from more than 130 years ago and have not been restored in any way. Each work tells an opera story and folklore, which is of great significance.