Department;
of;
Mathematics,;
Sichuan;
University,;
Chengdu;
610064,;
China;
Department;
of;
Mathematics,;
Southwest;
Normal;
University,;
Chongqing;
400715,;
China;
Department;
of;
Mathematics,;
Soochow;
University,;
Suzhou;
215006,;
China;
Institute;
of;
Mathematics,;
Southwest;
Normal;
University,;
Chongqing;
400715,;
China;
projective; special; unitary; group,; finite; simple; group,; set; of; element; orders,; classifica; tion; theorem.;