The China Qianlong Tong Bao 1 Cash coins are a type of currency that was used in China during the Qianlong reign (1735-1796). These coins have a denomination of 1 Cash and were composed of copper-zinc. They were circulated during the historical period of the Empire (up to 1948) in China. Uncertified by any modern authority, these coins hold historical significance as a product of the Qing Dynasty.