Technician top in her field but No 2 at home

"In the world only mama is dear. Child having mama is like a treasure."

This is a song most Chinese children sing as they grow up. When Zhang Hengzhen's daughter, 18, sang the song in her childhood, however, she changed mama into dad.

"When people interrupted and said she made mistakes, she would insist, 'No, dad is dear.'" recalled Zhang, a member of the 13th National Committee of Chinese People's Political Consultative Conference.