Mr Stoner has started a part-time, paid position with Yuhu Group Australia, according to advice tabled by the NSW Parliamentary Ethics Adviser, John Evans.

Yuhu Group has previously hired former NSW Treasurer Eric Roozendahl.

Mr Stoner has told Mr Evans the role involves "providing advice on suitable investments in the agribusiness sector and export of agribusiness products" but not lobbying government.

Mr Evans also says Mr Stoner has advised him that he "did not have any official dealings with [Yuhu] during your last two years of office".

However, Yuhu's website carries a report and photographs of Mr Stoner attending a "Chinese Business Leader Roundtable Meeting" at NSW Parliament in April 2014 when he was Deputy Premier and Trade Minister.

The roundtable was attended by then Premier Barry O'Farrell, Yuhu chairman Kiangmo Huang, Yuhu general manager Holly Huang and other Chinese business leaders.

Mr Stoner last week said he recalled the meeting, but was not aware a Yuhu representative was present. He would now inform Mr Evans of the fact.

Mr Stoner suddenly resigned as Deputy Premier and Trade Minister in October 2014 before quitting Parliament at the March 2015 election.

In May, Fairfax Media revealed Mr Stoner breached the Ministerial Code of Conduct by failing to seek advice from the ethics adviser before accepting an advisory role with investment bank Moelis Australia.

He only sought the advice after he accepted the part-time position and following media inquiries.

Yuhu manages and owns commercial real estate.

Australian Electoral Commission records show YuHu Group (Australia) declared donations of $670,000 to the Liberal and Labor parties during 2013-14, mostly before the 2013 federal election.

Mr Roozendahl, a former state secretary of the NSW ALP, now works as Yuhu Australia vice-president.