Her name is Xiao Tian, 21 years old cute girl living in Chaoyang District, Beijing. She is founder of the Cn Girl Security Team (the group has over 2,200 members).
Let's read about her that I quoted from this site:
On Xiao Tian’s (小天) blog are plentiful photographs of the Chinese girl posing, well, girlishly. Don’t be misled, though, by her baby-doll looks, her puckered lips or even her moniker, which in Chinese means ‘A little bit of heaven’. This isn’t some Pretty Young Thing advertising her charms on a dating site: Xiao Tian, 21, is the ‘general’ of China’s newest army of female hackers, the Cn Girl Security Team.