He also said the idea that Chinese investors viewed New Zealand as "up for buying" and were out to dominate the world was a complete misconception.
Chinese businesspeople did their homework, he said.
"We have to be very respectful of that and thinking you might be able to pull the wool over their eyes is a complete mistake."
Northlanders would need to work out their competitive advantages and had plenty to offer investors if the right packages were presented.
Whangarei's marine capabilities was one strong niche opportunity, for example, with a 16 million-strong Chinese city in Southern China wanting to invest in marine technology.
"Identify your competitive advantage, develop an investment proposal, work on relationship building and engage a trusted 'bridge' who will find a match for you. If you want to contract people with money you have to make it easy for them.
"But the idea that if you let too many wealthy Chinese people into New Zealand we will all be speaking Chinese within a few years is absolute nonsense."
Millionaire Bream Bay investor/developer Oliver Scott asked: "How do Chinese perceive Marsden?" Mr Hanna replied: "The same as you would if you didn't know anything about it."The Chinese Government recently named Lily Shi, who was educated in New Zealand, Hong Kong and China, as an outstanding young achiever for New Zealand in Chinese-New Zealand relations.