1 Cash - Jiaqing Tongbao, Boo-chuwan

The Jiaqing Emperor's reign opened under the shadow of his father Qianlong, who formally abdicated in 1796 but retained effective control until his death in 1799 — meaning early issues from this period were struck under a peculiar dual authority. The Boo-chuwan mint in Chengdu served Sichuan province, a region that spent much of this reign in the grip of the White Lotus Rebellion, a millenarian uprising that drained the Qing treasury so severely that cash coinage quality deteriorated measurably across provincial mints during the suppression campaigns.

Hartill 22.538 identifies meaningful variation in flan quality across this issue, consistent with Chengdu's documented brass supply disruptions.