1 Cash - Shunzhi Tongbao, Chinese reverse with Yi Li, Gong

The Board of Works Mint in Beijing was ordered in 1653 to adopt an experimental reverse format inscribed with the coin's official weight — one li — alongside the issuing bureau's cyclical designation. This short-lived policy, abandoned by 1657, was Beijing's attempt to rationalize cash coinage after decades of debased and wildly inconsistent private casting. The experiment failed to gain traction; the weight standard itself was never reliably enforced across other mints, and the format was quietly dropped in favor of the Manchu-script reverses that would define Qing cash for the next two centuries.