BEIJING – President Barack Obama said Wednesday that he met briefly with a half brother who lives in China and who recently wrote a semi-autobiographical novel about the abusive Kenyan father they share. Obama, who spent three days in China during his first official tour of Asia, acknowledged the meeting in an interview with CNN. He offered no details. An aide said later that the meeting took place Monday night after Obama arrived in Beijing, the Chinese capital. The White House had declined to say whether the president and Mark Ndesandjo would meet. And no White House official mentioned the visit until Obama did when asked about it. “I don’t know him well. I met him for the first time a couple of years ago,” Obama told CNN. “He stopped by with his wife for about five minutes during the trip.”  Details