请报警。
How it works
The structure is a simple polite request using 请 (qǐng).
- 请 (qǐng): please
- 报警 (bào jǐng): to report to the police
Chunk breakdown
The verb 报警 (bào jǐng) is a compound where 报 (bào) means 'to report', and 警 (jǐng) is short for 警察 (jǐng chá, police).
Emergency numbers
In mainland China, the emergency police number is 110. You can also instruct someone by saying 请打110 (qǐng dǎ yāo yāo líng).
Notes
A direct, polite command to bystanders to call the police.