Quite correct. Chinese coins rarely have "Western" numerals on them to indicate dates until the Communist takeover in 1949. Taiwanese coins still don't use Western AD dates.
This is a "fantasy cash". The obverse inscription is just like that which appeared on coins during the dates given on the reverse, 1862-1875, during the reign of the
Tong Zhi Emperor. It would most likely have been made no earlier than the 1950s.
"Coins" like this piece are often sold as a set of twelve reproduction coins, intended to illustrate the designs used on cash coins of the Qing Dynasty.
The other giveaway to their non-genuineness is the spotty background pattern on the obverse. The dots are intended to simulate the sandy background you get from a
genuine cast coin, whereas these replicas are machine-struck.
As for how it got to New Zealand, presumably in the pockets of a tourist, or perhaps bought at a local flea market where imitation coins like this are often sold by the bowlful.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis