Liu Yaqing, an old Beijing artillery, is Zhou Zhenshan. Sister Yaqing in Beijing is a gourd doll. His name is Zhou Zhenshan. When I was a teenager, I studied traditional gourd pyrography with my father. In the process of learning, he does not stick to tradition, while gradually refining his parents' works, while trying to find a new way. Not satisfied with the singleness of traditional pyrography, Zhou Zhenshan introduced the method of electric branding pen to show more details.