During the period of 1974, the cultural relics department of Hebei Province received a report that farmers in Shan Zhi Township, Pingshan County leveled farmland on a large scale and kept going to two large mounds nearby to collect soil. Some ancient cultural relics have been dug up and damaged, and archaeologists quickly rushed to the scene to clean up and investigate the scene. The Chinese-character-shaped tomb pattern proves that this is a royal tomb, and archaeologists found that the main tomb of the tomb was seriously stolen. Later, when the migrant workers took soil, they stepped on a big pit. After cleaning the hole, it turned out to be a library. There is no connection between the vault and the main tomb. This tomb type was later proved to be unique to Sun Yat-sen Mausoleum during the Warring States Period, and it was precisely because of the vault that a large number of precious cultural relics escaped. With the opening of warehouses on both sides of tomb 1, a large number of precious cultural relics reappear, and the first unearthed are a large number of wonderful and magnificent daily necessities. During the Warring States period, bronze figures of four dragons and four phoenixes, beasts with two wings of gold and silver, and fifteen bronze lanterns were unearthed one after another.

Restoration of cultural relics

When the bronze scheme of "Four Dragons and Four Phoenix" was unearthed, the painted wooden board on the bronze case had rotted, and the collapsed soil had deformed the scheme. The staff put the case in the restoration room of the Institute of Cultural Relics, and Liu Zengkun, who is in charge of the restoration of cultural relics, observed the cultural relics. After three days of observation, he began to untie the cultural relics with the hacksaw with the least number of saws, and then re-welded them to keep them intact. For a long time, National Cultural Heritage Administration attached great importance to this thing and prohibited copying. Once, a cultural relics department in Beijing tried to copy this cultural relic by other means, but the process was too complicated to complete.