Yep can`t see enough for a positive id

if i had to guess i would go for (Board of Revenue mint in Bejing). The Manchu mint name translates to Pao-Ch'uan, or "The Fountain head of the Currency"
While above mint may be correct this is even more of a guess
Emperor KAO TSUNG
AD 1736-1795
reign title: CH'IEN-LUNG, AD 1736-1795
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