China bars wife of detained Taiwan activist from visiting

Li Ching-yu, center, wife of Taiwanese pro-democracy activist Li Ming-che detained in China, gives a press conference after she was denied boarding the flight to Beijing at the airport counter at Taoyuan international airport in Taoyuan, Taiwan, Monday, April 10, 2017. Li Ching-yu told reporters that airline staff told her Beijing authorities had canceled her Chinese-issued travel permit when she tried to check in on Monday. Li had hoped to fly to China to demand information about her husband who has not been heard from since March 19. The sign in Chinese says "Release/free Li Ming-che." (AP Photo/Johnson Lai) (The Associated Press)

Li Ching-yu, center, wife of Taiwanese pro-democracy activist Li Ming-che detained in China, stands after she was denied boarding the flight to Beijing at the airport counter at Taoyuan international airport in Taoyuan, Taiwan, Monday, April 10, 2017. Li Ching-yu told reporters that airline staff told her Beijing authorities had canceled her Chinese-issued travel permit when she tried to check in on Monday. Li had hoped to fly to China to demand information about her husband who has not been heard from since March 19. The sign in Chinese says "Release/free Li Ming-che." (AP Photo/Johnson Lai) (The Associated Press)

Li Ching-yu, center right, wife of Taiwanese pro-democracy activist Li Ming-che detained in China, gives a press conference after she was denied boarding the flight to Beijing at the airport counter at Taoyuan international airport in Taoyuan, Taiwan Monday, April 10, 2017. Li Ching-yu said she has been prevented from flying to the mainland to demand a visit with her husband, whose case has inflamed cross-strait tensions. The sign in Chinese says Release/free Li Ming-che. (AP Photo/Johnson Lai) (The Associated Press)

The wife of a pro-democracy activist detained in China says she has been prevented from flying to the mainland to demand a visit with her husband, whose case has inflamed cross-strait tensions.

Li Ching-yu told reporters that airline staff told her Beijing authorities had canceled her Chinese-issued travel permit when she tried to check in on Monday. Li had hoped to fly to China to demand information about her husband, Li Ming-che, who has not been heard from since March 19.

A Chinese official said last week that Li is under investigation on suspicion of endangering Chinese national security and is in "good physical condition."

Li, a college employee who used social media to discuss China-Taiwan relations, is the first Taiwanese activist in years held by China on security charges.