"Wei Xuegang, who is an assistant to Huajian Group's president, said the firm" doesn't know about the situation", adding: "We haven't heard of this labor organization".
As the Trump and Xi families gathered at Trump's Florida resort, China's government approved three new trademarks to sell Ivanka Trump-branded products in China, although Beijing insists it gave her no preferential treatment.
"Activists exposing potential human rights abuses deserve protection not persecution from the authorities", said William Nee, China Researcher at Amnesty International. Ms Trump is the president's daughter and adviser.
"But this is the first time we've investigated Ivanka Trump (manufacturers), so it may very well be related to the brand". Li also said that the accusations against the detained investigator - that he was suspected of illegally using eavesdropping equipment - had "no factual basis", according to the Associated Press.More news: Madras student injured in attack over 'beef fest'
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China Labour Watch's Li said Hua and another investigator, Li Zhao, had worked covertly at a shoe factory in the city of Dongguan, in Guangdong province, that was owned by the Huajian Group.
Su, who was working at the factory in Jiangxi, found evidence of violations of workers' rights during the production of Ivanka Trump shoes, CNN quoted Li as saying. Su Heng had been working undercover at the Ganzhou factory since April, Li said.
The company produces around 100,000 pairs of shoes for the Ivanka Trump brand every year, from a total output of eight million pairs. A current spokeswoman for the company, Long Shan, did not reply to questions Tuesday.
"We were unaware of the allegations and will look into them immediately", a spokeswoman for Marc Fisher, which manufactures Ivanka Trump, Easy Spirit and its own branded shoes, said in an email Tuesday. Nine West did not respond to requests for comment.
"This never happened before in my 17 years' of experience". Police say Jordan punched his girlfriend as she was driving a van carrying him and her four children along an IN highway Sunday, May 28, 2017, causing a single-car crash that killed her 6-year-old daughter. In his opinion, they are being kept by the police or the factory, so that "there is no access to them".
According to the report, the three men had already documented excessive overtime and a below minimum wage base salary at the Chinese company.