Wang Zhihua, 27, from Zuoquan county in north China's Shanxi Province, has persisted in feeding his daughter mouth-to-mouth for over 18 months.

It is not a novel parenting skill, but a method that the single father hopes can save the life of his daughter Wang Keran, who is unable to chew food and suffers vomiting due to an uncommon disease.

Pictures showing Wang feeding his daughter mouth-to-mouth and media reports on his struggle to pay the girl's medical expenses went viral on the Internet earlier this week, drawing admiration and sympathy from the public.