A group of 26 suspects were arrested in China for smuggling almost USD $80 million worth of smartphones into Southern China from Hong Kong. Suspects were able to transport upwards of 15,000 devices in a single night, which were mostly refurbished iPhones, (according to the Chinese Customs' report) across the border that divides Hong Kong from mainland China. Drones confiscated by authorities in Shenzhen on March 29 - Via Reuters Drones were used to run 200-meter (660-foot) lines across the border and small bags, which held up to 10 smartphones each, were quickly carried through...
Source: https://www.gsmarena.com/chinese_customs_busted_26_suspects_who_used_drones_to_smuggle_iphones_into_china-news-30361.php