Honestly the ranking in figure 1 is ridiculous, as the method the authors used. First of all, very few people uses emails nowadays. According to CNNIC (China Internet Network Information Center), only 38% of chinese people still uses emails, and even fewer of them utilises emails for contact use. Secondly and the most importantly, there are lost and found Centers in China. These organisations won’t contact owners of lost items. They usually wait for people to come and ask, then confirm their identity. These two characteristics would obviously affect the result. Thus I would suggest the authors to do a proper cultural research before the investigation. Best wishes.
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