First is to use wax to make the model first, then wrapped in a layer of clay on its appearance, such as refractories, heat melt wax outflow, and the shell formed by refractory, again after the metal melt into the shell, after waiting for metal cooling will get the metal mould parts, refractory break the processing of metal is called precision casting technology, also known as investment casting or lost wax casting.　

       This method has existed since ancient times. As far back as hundreds of years before Christ, Chinese ancient laboring people created this lost wax precision casting technology, which was used to precisely cast zhong ding and vessels with various fine patterns and characters. According to expert identification, China's unearthed bronze in the Yin and shang dynasties and the spring and autumn period of the tomb of yi zenghou zun pan manufacturing used this very clever technology. Ceng hou yi tomb respects the base of dish to be the dragon that a number of mutual entwine, end is linked together, fluctuation crisscross, form the multilayer cloud grain shape design with hollow out in the middle. These designs using ordinary precision casting process are hard to make out, and using the lost wax method of precision casting technology, can make use of the characteristics of paraffin wax no strength, easy to carve, carved with ordinary tools can and want to get the tomb of paraffin wax material arts and crafts of the plates, then additional gating system, coating, dewaxing, pouring, beautiful tomb statue of plate can be calculated out. This method has a long history in the manufacture of metal jewelry and many non-metal handicrafts, and is still the main method in the production of many jewelry and handicrafts.

       This method has existed since ancient times. As far back as hundreds of years before Christ, Chinese ancient laboring people created this lost wax precision casting technology, which was used to precisely cast zhong ding and vessels with various fine patterns and characters. According to expert identification, China's unearthed bronze in the Yin and shang dynasties and the spring and autumn period of the tomb of yi zenghou zun pan manufacturing used this very clever technology. Ceng hou yi tomb respects the base of dish to be the dragon that a number of mutual entwine, end is linked together, fluctuation crisscross, form the multilayer cloud grain shape design with hollow out in the middle. These designs using ordinary precision casting process are hard to make out, and using the lost wax method of precision casting technology, can make use of the characteristics of paraffin wax no strength, easy to carve, carved with ordinary tools can and want to get the tomb of paraffin wax material arts and crafts of the plates, then additional gating system, coating, dewaxing, pouring, beautiful tomb statue of plate can be calculated out. This method has a long history in the manufacture of metal jewelry and many non-metal handicrafts, and is still the main method in the production of many jewelry and handicrafts.