Generally, it has to go through nearly 20 processes such as ebony refining, blank making, engraving, silver removal, molding, polishing and blackening, and finally an ebony is formed.

According to historical records, the production technology of black copper and silver was founded in Yongzheng period of Qing Dynasty (1723- 1735), with a history of nearly 300 years. It was specially built by Yue Yong, a descendant of Yue Fei, a famous gold fighter in Yuejiawan Village, Shiping County, Yunnan Province, and has been exclusively operated by Yue Jia.

It is said that a coppersmith named Shi Pingyue accidentally dropped the gold ring he was wearing into the copper he was smelting. Later, he found that the bronze statue he smelted was as black as coal, so he carved patterns on the surface of copper and embedded silver scraps to make the earliest black copper and silver. The production method of black copper and silver, in the production, the Yue family has always been adhering to the conservative concept of passing on from inside to outside, passing on men and not passing on women.

During the Republic of China, Yue family once opened a shop in Minsheng Street, Kunming, producing and selling black copper and silver utensils. In the later period, due to the shortage of raw materials, the output gradually declined, and the skills were passed on to Yue. Because Yue had no children, he had to pass on his skills to Lang Jiusu.

Before the founding of New China, even wealthy families did not enjoy the pleasure of black copper and silver because of the soaring price of gold and the lack of raw materials, as well as the high cost and high price of making black copper and silver, and the hard life of the people. In this way, the products of black copper and silver gradually declined and the skills were lost.

By the 1960s, black copper and silver handicrafts were almost extinct. Yue Zhongxiang, the only descendant of the Yue family, is old now, but he is unable to revive his ancestral business. In order to keep her unique skills from being overwhelmed, her daughter Yue made up her mind to make a comeback in the early 1990s, and followed her father to study and study the ancestral black copper and silver crafts.

Under the guidance of her father Yue Zhongxiang, after painstaking research and repeated practice, she adopted a special formula to smelt, carved patterns such as plum, orchid, bamboo, chrysanthemum, peony and lotus flowers on the copper sheet by hand, and "walked" silver into the groove to make black copper and silver handicrafts, which finally brought the ancestral crafts to life.