The working people in ancient China first produced a lot of mercury. According to ancient documents in China, before the death of Qin Shihuang, some princes had used mercury to infuse their tombs. For example, Qi Huangong was buried in Linzi County, Shandong Province, and his grave was filled with mercury. That is to say, China had acquired a large amount of mercury in the 6th century BC or earlier. /view/30596.htm