An echelon of trainer aircrafts takes part in the celebrations marking the 70th anniversary of the founding of the People's Republic of China (PRC) in Beijing, capital of China, Oct. 1, 2019. (Xinhua/Xiao Yijiu)
An echelon of trainer aircrafts takes part in the celebrations marking the 70th anniversary of the founding of the People's Republic of China (PRC) in Beijing, capital of China, Oct. 1, 2019. (Xinhua/Xiao Yijiu)
