A model of GJ-11 stealth armed reconnaissance drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A 609 intelligence radar of Chinese People's Liberation Army (PLA) is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

People visit the Pratt & Whitney booth at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A WL-1D drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A Wing Loong I drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A WL-10 drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of a lander, part of China's Tianwen-1 space mission to Mars, is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Models of Long March rockets for China's space missions are seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of the return capsule for China's manned space missions is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of Chinese Mars rover Zhurong, part of China's Tianwen-1 space mission, is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of Chang'e-5 lunar probe, part of China's space mission to the moon, is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

People walk past models of missiles and military vehicles displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors look at models of military equipment displayed at the China Aerospace Science & Industry Corporation Limited (CASIC) booth at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near a screen showing B611MR missiles at the booth of China Aerospace Science & Industry Corporation Limited (CASIC) at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of Boeing 737 Max airliner is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A member of Chinese People's Liberation Army (PLA) Air Force attends the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Models of People's Liberation Army (PLA) equipment, which took part in the 2019 parade marking the 70th founding anniversary of the People's Republic of China, are seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Female members of Chinese People's Liberation Army (PLA) Air Force visit the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors look at a model of WJ-700 armed reconnaissance drone displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A H-6K bomber is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near a model of WZ-7 high-altitude reconnaissance drone displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

People visit the booth of Chinese People's Liberation Army (PLA) Air Force at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near a screen showing Chinese military equipment near a sign marking the 100th founding anniversary of the Communist Party of China, at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A visitor poses with a Y-20 heavy transport aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near CM-401 anti-ship missile weapon system displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near a WS-64 multiple rocket launcher system displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A GJ-2 armed reconnaissance drone is displayed in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A Twin-Tailed Scorpion drone takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A Twin-Tailed Scorpion drone takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

People walk past the booth of State Administration of Science, Technology and Industry for National Defence at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of Airbus A350-1000 jetliner is displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A model of Boeing 777 airliner is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A woman walks past a Boeing logo at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near a model of WJ-700 armed reconnaissance drone displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors stand near a JH-7AII fighter-bomber displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A WZ-7 high-altitude reconnaissance drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A KJ-500 early warning aircraft is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A WZ-8 high-altitude drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors look at a J-16D electronic warfare aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors look at a J-16D electronic warfare aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Visitors look at a KJ-500 early warning aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A Wing Loong II armed drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A man watches Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song TPX IMAGES OF THE DAY 

A Wing Loong II armed drone takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A Wing Loong II armed drone flies by surveillance cameras at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A Wing Loong II armed drone takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

An AG600 amphibious aircraft takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A man watches Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Jets of Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

People watch Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Jets of Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A J-10 fighter jet of Chinese People's Liberation Army (PLA) Air Force Bayi aerobatic team is seen at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

People watch Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A CBJ business jet of Commercial Aircraft Corporation of China (COMAC) takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Pilots operate a JL-10 advance trainer jet of Chinese People's Liberation Army (PLA) Air Force at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A J-20 stealth fighter jet of Chinese People's Liberation Army (PLA) Air Force performs at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

Members of Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team attend the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A JL-10 advance trainer jet of Chinese People's Liberation Army (PLA) Air Force performs at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A JL-10 advance trainer jet of Chinese People's Liberation Army (PLA) Air Force performs at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song 

A J-20 stealth fighter jet of Chinese People's Liberation Army (PLA) Air Force performs at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song