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First of all, we need to separate cinnabar and mercury. Cinnabar(HgS) is no doubt in red powder form. But, mercury(Hg), the so-called "Quick Silver" is in liquid form. That was used extensively during certain dynasties. The most famous was that Qin Qi Huang Di(The First Emperor)'s burial had used the largest volume of liquid mercury to signify rivers. The toxic fume released from mercury kills the pest, bateria, and the wourld-be tomb-raiders. The signs of excessive amount of mercury in the burials have now been detected around the site in Xia
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