About author: LAI King-fai(1948-), male, native of Zhong Shan, Guang Dong, Professor of Henan University,
Ph.D, engages in algebraic number theory; LIANG Zhi-bin(1979-), male, native of Lianyuan, Hunan, Associated Professor of Capital Normal University, Ph.D, engages in computer algebra, elliptic curves, mathematics
education.