BEIJING — The blind activist at the center of a diplomatic tussle between the U.S. and China did not set out to be a dissident. Chen Guangcheng taught himself law to defend the constitutional rights he saw trampled so often.

“‘What do the authorities want me to do? Lead a protest in the streets? I don’t want to do that,’” New York University law professor Jerome Cohen recounted Chen as telling him after a local court rejected one of his lawsuits.

While Chen never took to the streets, his supporters rallied in his defense when he was imprisoned on what they call fabricated charges and when he was later kept under house arrest and beaten. Ultimately they helped free Chen, seeing him as a symbol for human dignity and for the promise that the law could bring justice in a society seen as unfairly tipped toward the powerful.

After Chen’s surprising escape from his well-guarded rural home April 22 and into U.S. diplomatic protection in Beijing, his fate is now being discussed in high-level negotiations. Both governments are trying to keep the case from overshadowing Secretary of State Hillary Clinton’s arrival today for annual talks on global hotspots and economic imbalances.

Chen’s predicament – his improbable flight to hoped-for freedom – has thrilled the many Chinese who are savvy enough to get around Internet censorship to learn about it. And it has reaffirmed for his supporters the qualities they have long admired: Chen displays a determination for upholding the law while exuding a charisma that reassures those around him.

“He’s just the most extraordinary person,” activist blogger He Peirong said Friday, four days after she picked up a bloodied Chen outside his village and sped toward Beijing and shortly before she was detained by police for helping him.

“He never gives up. He’s very spirited, willful and optimistic.”

His principled steeliness was on display in a video statement recorded while he was in hiding last week. In it, he calmly catalogs the mistreatment of him, his wife, his 6-year-old daughter and his mother while under house arrest. He names the officials who took part in the abuse and then demands an investigation and the protection of his family members, whose whereabouts are not known.

“I also ask that the Chinese government safeguard the dignity of law and the interests of the people, as well as guarantee the safety of my family members,” Chen said.

Chen, 40, is emblematic of a new breed of activists that the Communist Party finds threatening. Often from rural and working-class families, these “rights defenders,” as they are called, are unlike the students and intellectuals from the elite academies and major cities who led the Tiananmen Square democracy movement.

The new activists’ backgrounds have helped them tap into the grievances about a rich-poor gap, farmland expropriations, corruption and unbridled official power that fuel the 180,000 protests that experts estimate rock China every year.

Left blind by a fever as an infant, Chen eventually left his boyhood home in Dongshigu village, amid Shandong province’s corn and peanut fields, to attend a school for the blind. Later, while studying acupuncture and massage – traditional trades for the blind in China – at Nanjing University of Chinese Medicine, he taught himself law.

Even before graduating, he began championing the rights of the disabled and farmers in Dongshigu and surrounding areas. He petitioned officials to eliminate taxes on disabled farmers and collected signatures from farmers to shut down a polluting paper factory. His reputation soared after he successfully sued Beijing’s subway operator to allow the blind to ride for free.

Profiles and reports in the national media followed.

“The courageous blind peasant defender of rights,” the China Youth Daily, the newspaper of the Communist Youth League, called him in a 2004 article. “Thirty-three-year-old Chen Guangcheng is blind. But farmers from all over the area come to him to make decisions in any case of infringement or other disputes.”

He went to the United States on a State Department program, during which he talked about his ambition to attend law school and met Cohen, the law professor who became a staunch advocate for Chen. “He is an extraordinary person with a charismatic personality,” Cohen said in an interview in 2006. “You are moved by his emotion to try to improve the legal system and human rights.”

His resolve was soon tested.

In 2005, Chen and his wife, Yuan Weijing, documented reports of forced abortions and sterilization used to enforce a family planning campaign run by Linyi, the city that oversees Dongshigu. Among the cases were several women who said they were forced to have abortions within days of their due dates.

Officials often resort to such illegal measures to enforce policies that limit families to one or two children, fearing they will otherwise fail to meet national population targets and derail their chances for promotion. An investigation by the national family planning commission later validated Chen’s claims, and said some local officials had been punished for their wrongdoing.

The affair set local leaders against Chen.

He and his family were confined to their home and repeatedly beaten by people he and his wife have said were hired by the local government. When activist lawyers from Beijing tried to see them, they too were beaten and chased away.

In 2006, he was tried and sentenced to four years in prison for “damaging property and organizing a mob to disturb traffic” – charges that apparently stemmed from the confrontation between supporters and those enforcing his house arrest.

After his release from prison, his house arrest continued, enforced by surveillance cameras and teams of hired locals who guarded his house and the streets into the village.

Now in U.S. protection, Chen faces a dilemma. His supporters say he wants to stay in China and live with his family in safety, rather than go abroad. Yet it’s far from certain Beijing is able or willing to guarantee their safety, unless they take U.S. sanctuary.

Chen also struck a measured note of defiance in last week’s video message while asking Premier Wen Jiabao to investigate his family’s treatment: “If anything more happens to my family, I will continue to pursue justice.”