Questions have been raised over a senior WA Labor minister and his relationship with the Chinese billionaire who ended the political career of former senator Sam Dastyari.

A Fairfax Media investigation has revealed Treasurer Ben Wyatt accepted thousands of dollars in overseas travel from an organisation linked to China's communist regime and controversial property developer Huang Xiangmo.

Mr Wyatt described the all-expenses-paid, five-day sojourn to China in 2015 as a delegation organised by federal Shadow Treasurer Chris Bowen, but it was paid for by the Australian Guangdong Chamber of Commerce, which is run by Mr Huang.

Mr Huang is the Chinese businessman who was tipped off by Mr Dastyari in 2015 that his phone may have been under surveillance by intelligence agencies and who has donated hundreds of thousands of dollars to Australian political parties, including Labor.