The Overseas Investment Office says it is still investigating the unauthorised purchase of four North Island farms more than two years ago by Chinese business interests who unsuccessfully tried to buy the Crafar family farms.
The Government declined an application by Hong Kong-based Natural Dairy Holdings late in 2010 to buy the 16 Crafar farms out of receivership.
Natural Dairy's application also sought retrospective approval for the purchase of another four farms by an associated company also headed by business woman May Wang, who is now facing bribery and money laundering charges in Hong Kong.
The Overseas Investment Office has confirmed its investigation of those transactions, started in 2010, is still going.
The OIO says it is having to consider a number of quite complex matters and it can not comment further.
But the Campaign Against Foreign Control of Aotearoa has criticised the lack of Government action.
Ssecretary of the group, Murray Horton, says the Government should cancel the sale of the four farms.
"It's not that complex, this buyer has been refused official permission to buy those four farms, the ownership should be cancelled by whatever legal measures are needed to do that under the law and and they should be stripped of the ownership - it's fairly straight forward."
The Government has recently confirmed the sale of the 16 Crafar farms to another Chinese company, the Shanghai Pengxin Group, on the recommendation of the OIO.
But the New Zealand group of farming and iwi interests which forced a review of the sale, says it will challenge the decision in the High Court again.
