The number is certainly larger than the 2737 listed by the government in court documents, an official said.
The officers are also learning about Chinese culture as part of their lessons, including lucky numbers and etiquette during home visits.
The Immigration Minister was not told of the drug smuggler's journey when making a decision on his residency application.
The discussion revolved around the current Immigration Minister's handling of a Czech drug smuggler's case.
Kelvin Davis read all the information for the toughest decision of his political career. But when quizzed on the one-hour Karel Sroubek call, he changed tack.
"Much of what has been said about me and my circumstances does not present the true picture," he says.
Karl Sroubek was subject for deportation after entering the country under a false identity, but has been granted residency.
"Someone with this kind of offending to their name would usually be a quite straight forward deportation," she said.
Refugees are having to wait months for support services, the New Zealand Myanmar Ethnics Council says.