Unlike many of his fellow citizens who usually have one child, Xiao has four children. Two of them were born in Hong Kong and two in the US. Some people on the Internet think the reason his children entered Peking University is because the exam is much easier taken from Hong Kong.

Just as the "Tiger Mom" controversy started simmering down in China, here comes the "Wolf Daddy." [File photo]

Neitizen: "It's so much easier to enter Peking and Tsinghua Universities as Hong Kong exam-takers. Why don't you spank your children to enter the University of Hong Kong?"

Parent: "I think it's fake. This is just a way he makes money, through selling his book. I hope parents do not follow him."

A parent said, "I think this is a kind of forcing children to accept parents' thoughts. I don't think it's good for children to force their thoughts. Their minds will be twisted."

Children do not welcome the "Wolf Daddy" method either. A pupil said, "I'll feel very sad if my mom and dad beat me, and I'll be weak to do anything."

Xiao argues that all those critical voices are from people who either do not have parenting experience or do not truly understand him. Anyway, he has succeeded in stirring another round of controversy on parenting following the roars of a "Tiger Mother" in the US.