Wellington (New Zealand), June 17 The infamous cashed-up Asian-origin couple, who escaped from New Zealand, continue to prove elusive for Kiwi police.

Kiwi police say "cultural differences" are challenging their efforts to find failed petrol station owner Leo Gao and his girlfriend.

Both fled New Zealand to Asia in May after Westpac accidentally deposited 3.8 million New Zealand dollars into his account.

The embarrassing blunder was caused by a misplaced decimal point in a bank loan application.

Gao and Kara Hurring were sighted in Hong Kong and the gambling mecca Macau a month ago, but despite international media attention have not been seen since.

New Zealand police are clearly not predicting an imminent capture.

They said on Wednesday they were still preparing a mutual assistance request to the Chinese Government, a process which has taken several weeks. (ANI)