China will reduce the vertical air space between aircraft starting from November 22, the General Administration of Civil Aviation (CAAC) said.

Called Reduced Vertical Separation Minimum (RVSM), it shortens the space between aircraft from 2,000 feet (610 meters) to 1,000 feet (305 meters), allowing the number of layers of aircraft flying between 29,000 feet (8,841 meters) and 41,000 feet (12,500 meters) to be increased from seven to 13.

"We can make better use of the airspace, increase air traffic flow and reduce flight delays, said Wang Changshun, CAAC's deputy director.