Definition of "hoppo"

On the way two Chinese buildings were pointed out to us as hoppo, of custom-houses, at both which all boats […] are obliged to stop and undergo a strict search or examination by a petty mandarin.

c. 1808, William Hickey, Memoirs of a Georgian Rake, page 108

Hoppo. This is a tribunal, that has in charge the collecting of imperial dues on navigation and trade, and remitting the amount to the Grand-hoppo at Canton...

1836, Anders Ljungstedt, An Historical Sketch of the Portuguese Settlements in China..., page 86

The Hoppos, who look on Europe Ships as a great branch of their Profits, will give you all the fair Words imaginable.

1711, Charles Lockyer, An Account of the Trade in India..., page 101

...received a most polite invitation from the late Mr. William Parry, a supercargo, to meet the Hoppo (or principal custom-house officer)...

1814, James Wathen, Journal of a Voyage in 1811 and 1812 to Madras and China..., page xvi

Hoppo. This is a tribunal, that has in charge the collecting of imperial dues on navigation and trade, and remitting the amount to the Grand-hoppo at Canton... at Macao, the Portuguese designate him by the epithet Grand-hoppo, in contradistinction to another... [T]he Hoppo of Macao... levies on foreigners, coming and going, an arbitrary tax on their persons and baggage. He is assisted by compradors, pilots and others...

1836, Anders Ljungstedt, An Historical Sketch of the Portuguese Settlements in China..., pages 86–90

The ‘Hoppo’ (as he was incorrectly styled) filled an office especially created for the foreign trade at Canton... The Board of Revenue is in Chinese ‘Hoo-poo’, and the office was locally misapplied to the officer in question.

1882, William C. Hunter, The ‘Fan Kwae’ at Canton before Treaty Days..., page 36