Sources say the group will likely impact North Koreans who subsist on smuggling.
Li Xinhua's ribs were broken during a beating by police officers.
Their petition over confiscated land has still not been resolved, though.
National League for Democracy party leader Aung San Suu Kyi ends several days of campaigning in Kachin state.
An insurgent spokesman says the assault was retribution for snubbing the talks.
Shanghai-based activist Feng Zhenghu has been prevented from leaving China on grounds that his doing so would 'harm state security.'
Some 2,000 staff and students march in academic robes after an outspoken law professor is voted down for a leadership role.
His protest follows others in September along Ngaba's main street, called 'Heroes' Road' by local residents.