gems, jade, ruby, sapphire, spinel, Burma, Myanmar, Chinese trade with Burma

Sun Laichen: Contains two brief items, one an account of how Chinese traders traveled to Burma to buy precious stones, including a description of the mining and marketing of the stones by the indigenous people, and the other about the export of tea from Mubang to Yunnan and the interior of China. Since Zhang Hong served in various official capacities in Yunnan between 1741 and 1753, this work must have been written during or after this time.