Penguin Books revolutionized flying in the 1930s.
Daigou -LRB- Chinese  : 代购 daigou -LRB- -LSB- langpronˈdaɪˈgoʊ -RSB- -RRB- ; also 海外代购 haiwai daigou -RRB-. Chinese. Mandarin Chinese. is a channel of commerce in which an overseas person purchases commodities -LRB- mainly luxury goods but also groceries -RRB- for a customer in mainland China ,. luxury goods. luxury goods. mainland China. mainland China. since prices for luxury goods can be 30 to 40 percent higher in China than abroad .. luxury goods. luxury goods. The phrase means `` buying on behalf of '' .. Daigou sales across sectors total $ 15 billion annually .. In 2014 the value of the daigou business just in luxury goods increased from CN ¥ 55 billion to CN ¥ 75 billion yuan -LRB- USD $ 8.8 billion to $ 12 billion -RRB- .. luxury goods. luxury goods. yuan. RMB. Daigou purchases are often from luxury brand boutiques in major fashion cities like Paris , London , New York City , Hong Kong , Tokyo and Seoul .. Paris. Paris. London. London. New York City. New York City. Hong Kong. Hong Kong. Tokyo. Tokyo. Seoul. Seoul. Some daigou operators use Weibo and WeChat to communicate with their clients .. Weibo. Sina Weibo. WeChat. WeChat. The large demand for daigou service is due to concern over unsafe products , especially food safety problems ,. and China 's high import tariffs on luxury goods .. luxury goods. luxury goods. Some daigou service providers intentionally sell counterfeit made in China products that have been altered to appear purchased abroad .. made in China. made in China. A 2015 survey of Chinese online luxury shoppers found that 35 % have used daigou to purchase luxury goods online , while only 7 % used the website of the brand they are buying , or think they are buying .. Chinese. Mandarin Chinese. luxury goods. luxury goods. Approximately 80 % of Chinese luxury purchases are made abroad .. Chinese. Mandarin Chinese