There are up to 60 Chinese financial refugees in New Zealand and China wants them back.
John Key's been meeting with China's Premier Li Keqiang and says the issue of funds from graft being smuggled out of China was raised.
Key says New Zealand could enter into an extradition treaty with China, even though last year he said he wouldn't.
"It possible," Key told reporters in China.
"We won't extradite people to China unless they meet the condition that they wouldn't be subjected to either torture or the death penalty," he said.