Aerial photo taken on May 10, 2018 shows a drone carried with parcels, taking off from a branch post office in Weicheng Township, Qingzhen City of southwest China's Guizhou Province. China's express delivery sector handled 50.5 billion parcels in 2018, up 25.8 percent year on year, data from the State Post Bureau (SPB) showed. Gross business revenue of the sector increased 21.2 percent year on year to hit 601 billion yuan (about 88 billion U.S. dollars) last year, according to the SPB. (Xinhua/Liu Xu)