Mr Maguire's associate in a cash-for visas scheme, Maggie Wang, made a second public appearance at the Independent Commission Against Corruption on Tuesday and gave more details about other alleged shared plans to benefit from investments in Sydney and Samoa.

ICAC was played intercepted phone calls in which Mr Maguire instructed Ms Wang to seek "50 or 100 grand" from Junlun Petroleum, a company experimenting with oil field extraction technology, in return for him organising meetings with potential investors.

Mr Maguire said on the call he had "hit the jackpot" and wanted Ms Wang to represent and translate for Junlun at a global conference in Adelaide and a meeting with Australian gas and oil giant Santos.

"I think you should have a consulting fee because it costs money to do all this ... and they should give you a percentage and/or shares of the company as the success fee, ongoing, not only Santos but any companies they deal with," Mr Maguire said.

"If you introduce their technology, they've got the worldwide patent; what you want is a share of the company and whatever it is they do in Australia. Your consultancy fee might be 50 or 100 grand."

Mr Maguire said three per cent was a standard deal but "when you're talking oil, you're talking big money" and Ms Wang said they would share the proceeds "half and half".

The oil deal ultimately fell through.

Ms Wang said Mr Maguire also sent a letter to the mayor of Shenzhen on behalf of Samoa Chamber of Commerce and Industry CEO Hobart Vaai to assist investments in a Samoa casino by Hong Kong businessman Ho Yuen Li.

She also agreed with counsel assisting ICAC Scott Robertson that Mr Maguire's intercepted text messages showed he was willing to intervene in a development application for a Sydney north shore development with the aim of securing a $420,000 commission.

Ms Wang said the last time she met Mr Maguire was in a coffee shop in Sydney in August 2018, where he said there had been an "unfortunate accident in the paddock with his phones and iPad ... under tractors".

Ms Wang said she had been passed a message from Mr Maguire via a mutual acquaintance, Chinese diplomat Du Wei, which told her to delete her emails and text messages with the then-Wagga MP.

Ms Wang told ICAC she then deleted all her texts and emails with Mr Maguire dated before February 2018.