Mr. Wang was translated into police officer Wang?

I don't know SIR's explanation in China or anywhere.

But the original intention is to respect people, almost like "sir" Address the teacher: sir.

Britain is the title of jazz. Sir John is Sir John. Never translate it into officer John.

There is no police meaning at all.

Sheriff Wang is the police chief Wang, so you should add the alarm number, otherwise it may be Wang.

Or inspector Wang is inspector Wang/police officer Wang.

Calling Mr. Wang police officer is actually a kind of honorific title, which means that uncle Wang is more than police officer Wang.

Appendix Police Level:

China Police Class:

Commissioner-General (Chinese: Commissioner-General)

Deputy Commissioner-General (Deputy Commissioner-General)

Commissioner 1 Level 1 (Police Commissioner I, Y and jí j ǐ ngji ā n)

Commissioner II (Commissioner II)

Commissioner III (Police Commissioner III)

Inspector 1 I (first-class police inspector, Y: and Jí j ǐ NGD)

Inspector II (Inspector II, èrjí jǐngd)

Inspector III (police inspector III, sānjí jǐngd)

1 First Superintendent (First Superintendent, Y and j ǐ ngs sum)

Superintendent II (Superintendent II)

Superintendent III (Superintendent III)

1 first-class police officer (first-class police officer, Y: and Jí j ǐ ngyuá n)

Police officer II (police officer II, èríjǐngyuán)

Hong Kong Police Class:

Commissioner (Traditional Chinese: Commissioner of Police)

Duty Commissioner (Deputy Commissioner of Police)

Senior Assistant Commissioner [〔SACP〕] (Senior Assistant Commissioner of Police)

Assistant Commissioner (Assistant Commissioner of Police)

Chief superintendent of police

Senior superintendent

Chief police officer

Chief inspector of police

Senior police inspector

Police inspector

Police probability inspector [pi]

Police chief [SSGT] (chief of police)

sergeant

Senior police officer

police

British police:

Police officer (detective/uniformed)

A (detective/uniformed) police officer

Inspector (detective/uniformed)

Chief inspector (detective/uniformed)

Superintendent (detective/uniformed)

Chief Superintendent (detective/uniformed)

Assistant chief of police

Deputy police chief

County police chief