"The two litigants were very cooperative ... We are looking into the purpose of their visit,"she said,adding that the pair travelled frequently to Taiwan.
A different report in Taiwan'sLiberty Times said CIIL had tried to invest in a Taiwanese geothermal company two years ago but had been knocked back by a government investment review board on national security grounds.
Cho Jung-tai,chairman of Tsai's Democratic Progressive Party,which favours Taiwan's formal independence,said there needed to be further investigations into Wang's claims.
"The enemy of democracy is China. At present Taiwan's most ambitious opponent,competitor,is also China,"Cho told a news conference in Taipei on Monday.
Taiwan's presidential office cited Tsai as saying the allegations were being probed,and that people should not reach conclusions before a complete investigation was done.
Among several allegations levelled,the would-be defector said he had helped guide positive media attention toward certain Taiwanese politicians,including Tsai's main opponent,Han Kuo-yu of the China-friendly Kuomintang party.
The Kuomintang's Han said he would drop out of the election if he has taken any money from the Chinese Communist Party.
Speaking at a separate news conference,Kuomintang's spokeswoman Wang Hong-wei said the issue was one of"blundering Communist espionage"that should be investigated immediately,and accused the government of seeking to use the matter to"manipulate elections".
China's state-backedGlobal Times newspaper said in a Monday opinion piece that Liqiang sounded like an"opportunistic liar,probably a swindler".
Asked about separate allegations that China had tried to plant a spy inside the Australian Parliament Chinese Foreign Ministry spokesman Geng Shuang said that,"For quite some time,certain Australian politicians,media outlets ... have demonstrated some kind of nervousness in China-related issues and have been fabricating so-called Chinese espionage and infiltration in Australia... lies are lies no matter how many times they are repeated,” he said.
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“China follows the principal of non-interference in others affairs."
Three Taipei-based diplomatic and security sources,speaking on condition of anonymity,told Reuters they also doubted whether Wang was who he claimed to be,though his allegations were plausible.
"Our assessment is he is most likely not who is says he is,"said one of the sources.