An air echelon escorting flags (R-L) of the Communist Party of China (CPC), the nation, and the People's Liberation Army (PLA) flies over the Tian'anmen Square, marking the start of a grand military parade celebrating the 70th founding anniversary of the People's Republic of China in Beijing, capital of China, Oct. 1, 2019. (Xinhua/Pang Xinglei)