"This is a way of keeping people under pressure, under police control, without subjected them to actual confinement", said Jerome Cohen, a law professor at New York University and a Chinese human rights expert.
Hua declined further comment but said he had not been mistreated.
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Cosby spokesman Andrew Wyatt said by email that the legal team will not let him speak about sexual assault. He pleaded not guilty to the felony charges and denied wrongdoing in other accusations made against him.
In October, Huajian had confided to AFP that the group had produced approximately 100 000 pairs of shoes Ivanka Trump in recent years -and even though Donald Trump was complaining that during her campaign the companies launching operations in China.
The company said it operates lawfully and that China Labor Watch "invented so-called "facts" by illegal means of buying undercover work, which has already affected the enterprise's normal business seriously and affected the survival and employment of tens of thousands of staff".
Huajian Group has denied the allegations.
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In addition to his tweet , Trump also retweeted a graphic mocking the CNN as the "Fake News Network". "Those are the facts". The release of the embarrassing video comes after another high-profile fake news flop at the network.
The activists' lawyers said their actions were not criminal and they hoped Chinese courts would conduct a fair trial, the US -based China Labor Watch said. China Labor Watch said two were taken from a hotel room while the third was detained by customs officials in the southern city of Shenzhen while en route to Hong Kong.
China Labor Watch was planning to publish a report in June alleging low pay, excessive overtime and the possible misuse of student interns.
The U.S. State Department called for the activists to be freed earlier this month, which China rebuffed, saying the case was an "internal matter". They had been detained for about a month for allegedly using bugging and eavesdropping devices while collecting information about a plant owned by shoemaker Huajian Group in the southeast province of Jiangxi. The three were detained by police in late May.
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Iraqi Security Forces launched the offensive on the historic district of the Old City in western Mosul on June 18. But hundreds of civilians have been killed in the past month as they tried to flee the Old City.
Marc Fisher Footwear, which makes Ivanka Trump shoes under license at the Chinese factory that was investigated by the labor rights group, has said it was looking into the allegations.