It fired a heated debate on the virtues or otherwise of 'Chinese' parenting in the United States, but when Amy Chua''s 'Battle Hymn of the Tiger Mother' hit the book stores in Beijing, much of the incendiary packaging had been toned down. Just as the 'Tiger Mom' controversy started simmering down in China, here comes the 'Wolf Daddy.' Xiao Baiyou, a self-proclaimed expert on strict parenting, is sparking a new round of fervent discussion on child-raising methodologies among anxious Chinese parents.