ZHUHAI, China (AP) — A military drone whose manufacturer says it can cruise for 20 hours at 15,000 meters (50,000 feet) is among Chinese warplanes, missiles and other weapons technology shown in public for the first time at the country’s biggest air show. An official newspaper said the Chinese space program planned to unveil a rocket for crewed space flight capable of carrying a 25-ton payload to lunar orbit at the 13th China International Aviation and Aerospace Exhibition. The ruling Communist Party is pouring billions of dollars into developing fighter jets, stealth technology, drones and other hardware for its military wing, the People’s Liberation Army, as it presses claims to disputed seas and other territory.