There are two main methods for casting bronze ware in ancient China: the block mold method and the lost wax method. The origin of the original lost wax method, the burning lost method, is very early. The bronze [rope ears cast in the Spring and Autumn Period unearthed in Tongling, is a representative work of the burning lost method. The lost wax method mainly includes the following process flows: core wax mold making, waxing and roasting melting, pouring and casting processing. It uses yellow wax (beeswax), animal oil (butter) and other materials to make a wax mold of the object to be cast, and then applies the prepared mud material on the surface of the wax mold or pours fine mud to form a mud shell, and then applies refractory materials on the surface of the mud shell. After roasting, it becomes a casting mold, and then heats and bakes to melt the wax mold and flow out to form a mold cavity, and then pours copper liquid into the cavity. After solidification, the casting is obtained. As a unique lost wax method in the history of bronze casting, the craftsmanship is exquisite and unique. Because the wax material has the characteristics of good plasticity, it can be molded into a variety of different shapes, and it is also quite convenient to sculpt patterns on the surface of the wax strip. Therefore, when some objects with complex and special shapes are difficult to cast with block molds, the lost wax method can be used for casting, for example, winding feet, buttons, hollow three-dimensional patterns, etc. Historically, the lost wax method has been widely used to cast tripods, Yi, seals, musical bells and Buddha statues, and it is deeply loved by people. The lost wax method has a very wide influence. In modern times, it has been transformed into investment casting and is widely used in the manufacturing industry. The lost wax method in Tongling has a long history. In recent years, under the guidance of well-known experts and scholars, Zheng Dongping and others of Tongling Xinjiuding Copper Cultural Industry Co., Ltd. have successfully reproduced Xu Gongning's hollow coiled snake patterns, free Guanyin and other representative works using the traditional lost wax method, so that this skill has been protected and passed on, the production process has become more standardized, and it is intended to be used in the production of innovative copper handicrafts. Information source: Anhui Provincial Intangible Cultural Heritage Protection Center Information source: Anhui Provincial Intangible Cultural Heritage Protection Center