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 has handled 50 billion parcels so far this year, the State Post Bureau (SPB) said on Friday. Boosted by booming e-commerce, the express delivery industry saw fast growth over the past few years, with the number of handled parcels increasing by 10 billion on average in each of the past three years, the bureau said. China has topped the world's market for five consecutive years, surpassing the combined amount handled in developed economies including the United States, Japan, and Europe. (Xinhua/Liu Xu)