Xiao Baiyou, a 47-year-old Hong Kong businessman, explains his parenting approach in his book That's Why They Go to Peking University, which has stirred controversy over his parenting methods since its publication release in June.

Xiao, calling himself a wolf dad, believes he has proven himself to be a successful father, because three of his four children were admitted to Peking University, one of the top universities in China. From Xiao's perspective, the best principle of education lies in Chinese traditional culture, parents ruling with absolute authority at home while children abiding by tough rules.

Before going to university, his children were not allowed to make friends, participate in extracurricular activities or enjoy sleepovers. Even visiting a classmate involved a complicated application procedure that included detailing the classmate's academic records, parents' names and phone numbers, the reasons for the visits and their return time. At home, TV, soft drinks, snacks, free access to Internet, air conditioning in the bedroom and pocket money were also banned. Breaking any rule resulted in a beating. The rules were enforced so the children could focus solely on their studies.

Those who say yes to Xiao's approach believe that strict parenting will help children develop good living and learning habits and respect rules. However, others maintain that Xiao ignores his children's personal choices and feelings, which will result in far-reaching psychological scars.