A prominent Chinese rights attorney is missing, believed detained, after he planned to attend an event linked to Human Rights Day at the EU representative office in Beijing on Dec. 10, RFA has learned.

Tang Jitian has been incommunicado since texting friends a couple of hours before the event was due to start that it was "not safe" to attend, U.S.-based legal scholar Teng Biao said.

Repeated calls to Tang's phone rang unanswered on Dec. 16.

"I think it's definitely more serious," Teng said. "We have heard nothing from Tang Jitian since Dec. 10, so it looks like an enforced disappearance."

He said the situation of Chinese dissident and former legal advocate Guo Feixiong, also known as Yang Maodong, appeared to be similar.

Guo has been incommunicado since writing an open letter to Chinese premier Li Keqiang, asking him to lift a travel ban and allow him to visit his critically ill wife Zhang Qing in the United States, Teng said.

"They have both played a prominent role in rights activism in China, and they are almost certainly in the custody of certain departments," he said.

Tang's friend Zhao Zhongyuan said the lawyer was at the point of physical and mental collapse when he disappeared, after being prevented from traveling to Japan to visit his 24-year-old daughter Kiki, who was in a coma due to complications from tuberculosis.

"His health had reached the point of collapse, because he had been persecuted for a long time," Zhao said. "He couldn't work, couldn't leave the country and was homeless, forced to stay a couple of days with one friend, and a couple of days with another."

"He had no medical insurance to seek treatment even if he was sick," he said.

Tang's daughter Qiqi is currently in a state of brain death after developing meningitis as a complication of the tuberculosis, but remains on life support in hospital, Zhao said.

"If they switched off the life support, she would be gone," he said. "She worked hard at her language class in Japan and passed the N1 language exam."

"She lived very frugally, and when she got sick, she self-medicated, so treatment was delayed," Zhao said. "By the time she went to hospital she was already in a coma."

"It was extremely cruel of the [ruling] Chinese Communist Party (CCP) to not let him go to visit his daughter," he said.

Tang was stopped by border guards at Fuzhou Airport in May 2021 as he tried to board a flight to Japan, on the grounds that his leaving would "endanger national security and interests."

Tang's friend Zhao Zhongyuan, a U.S.-based traditional Chinese medicine doctor, said he is being forcibly deprived of sleep, as well as beatings.

"They won't let him sleep at all, and they are hanging him up and beating him, very similar to [the way he was treated] 10 years ago," Zhao told RFA on Tuesday. "Judging from the photo, it looks similar to the torture he suffered [in 2014]."

"And his state of health is a whole lot worse than it was 10 years ago," he said.

RFA was unable to verify Zhao's report independently.

Zhao has previously said Tang was already at the point of physical and mental collapse when he disappeared, which came after he was prevented from traveling to Japan to visit his 24-year-old daughter Qiqi, who is in a coma due to complications from tuberculosis.

"[The authorities] have said that if there is ongoing attention on his case, they will send him back to his birth city [of Jilin]," Zhao said. "A source told me that I should stop speaking out for him."

"They said his family have put their faith in the [ruling] Chinese Communist Party (CCP) and the government," he said. "But the less I speak out, and the more I cover this up, the less likely Tang Jitian is to get out eventually."

Tang was stopped by border guards at Fuzhou Airport in May 2021 as he tried to board a flight to Japan, on the grounds that his leaving would "endanger national security and interests."

Tang's travel ban began after he lost his lawyer's license in 2010 for defending practitioners of the banned Falun Gong spiritual movement.

He was among a group four Chinese rights lawyers tortured by police after being detained in March 2014 during a protest outside a detention center in Jiansanjiang in northeast China demanding information about Falun Gong members believed to be incarcerated there.

In 2017, he was turned back by border guards at the Lo Wu border crossing after he tried to travel to Hong Kong to seek medical treatment for leukemia diagnosed after his release from detention. He was told at the time that his leaving the country could pose a "threat to national security."

U.S.-based legal scholar Teng Biao hit out at the use of travel bans to silence prominent dissidents and activists.

"If you don't do as you're told, or you do some kind of human rights or political work, they will confiscate your passport and prevent you from leaving the country," Teng told RFA.

"Tang's daughter is critically ill in Japan, and he should be allowed to visit her, purely on humanitarian grounds," he said. "But the Chinese government has no concept of humanitarian considerations."

"They are doing this as a form of punishment; a way to get back at human rights lawyers," Teng said.