What book did Professor Li Yupei write?
Wonderful curve, mystery of circular area (both won the first prize of the 4th China Book Award 1993), commander in chief of mathematics (won the second Soong Ching Ling Children's Literature Award 1990, the first prize of the first national children's popular science reading book 1993), and the battle between rational numbers and irrational numbers (1 993) Math Entertainment Club (1987 won the National Best-seller Award) and Math Wonderland Story Series (1997 won the 8th Bingxin Children's Book Award). Various books have been published in Hongkong and Taiwan Province Province and translated into minority languages for publication.