Aerial photo taken on Dec. 5, 2021 shows people picking kumquats at a kumquat orchard in Rongan County, south China's Guangxi Zhuang Autonomous Region.The total value of e-commerce transactions of various products in the county increased from 880 million yuan in 2016 to 5.4 billion yuan in 2021, among which the online sales of Rongan kumquat exceeded 1.9 billion yuan.