The Labour Cabinet minister who handed over a bottle of wine to Donghua Liu's partner at a fundraiser denied the millionaire businessman paid $100,000 for the auction prize.
Rick Barker was hosted by Liu at a lavish dinner on a cruise up the Yangtze River in 2007 and was photographed presenting Juan Zhang, who has two children with Liu, 56, with the large bottle signed by then Prime Minister Helen Clark.
Liu said he paid "close to $100,000" for the prize, according to a signed statement dated May 3, a price tag Mr Barker called "an extraordinary and eye-watering amount, one that I would recall if it happened and I don't".
Mr Barker, who was Minister of Internal Affairs at the time, added: "Had $100,000 been paid for a bottle of wine at a fundraiser that I was not at, I am certain I would have been told about it and I haven't. That figure for one item is considerably more than most fundraisers got in total."