2. professor:? (giu su) is used to address (giu su nim). (nim) is to show respect for others;
3. The following are the titles of other occupations:
Lawyer: (bien ho sa), the corresponding Chinese character is defender.
Police: (gieong chal guan), the corresponding Chinese character is police officer;
Civil servant: (Gong Muwen), the corresponding Chinese character is civil servant;
Company employee: (Huisa jig gun), the corresponding Chinese character is club employee.