Based on our uniform random sample, gender distribution of Weibo is 59.36% for male and 40.64% for female. This results is against our expectation, male users accounts for majority of the network. Compared with Facebook and Twitter gender distribution in figure that female users dominate both social services with percentage around 60% respectively. There are several possible sources to make this huge contrast. One is the cultural difference in technology use between East and West, there might be more homeboys in China who stay connecting with outworld by Internet such as Weibo and some forums. Another reason is that some unactive users register Weibo accounts but just leave accounts there without modifying the default settings where the default gender is male.

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