School;
of;
Mathematical;
Sciences,;
Peking;
University,;
Beijing;
100871,;
China;
Department;
of;
Mathematics,;
Yantai;
University,;
Yantai;
264005,;
China;
School;
of;
Mathematical;
Sciences,;
Peking;
University,;
Beijing;
100871,;
China;
LMAM,;
Peking;
University,;
Beijing;
100871,;
China;
multiplicative; unitary; operator,; Woronowicz; C*-algebra,; crossed; product.;