WASHINGTON - Top US military officer General Martin Dempsey will pay a rare visit to China this month as the Pacific powers discuss concern over tensions with North Korea, the Pentagon said Tuesday. Defense Secretary Chuck Hagel confirmed Dempsey’s visit when he paid a congratulatory telephone call to China’s new defense minister, General Chang Wanquan, Pentagon spokesman George Little said. Hagel “said he looks forward to hearing the results of Chairman of the Joint Chiefs of Staff General Marty Dempsey’s trip to China later this month,” Little said in a statement. Little said that Hagel also invited Chang to visit the United States later this year.