detective; investigator; spy; an undercover agent who investigates crimes or gathers intelligence

to conduct a criminal investigation or detection, specifically by police or prosecutors to collect evidence and identify suspects

to reconnoiter or scout; to collect information on enemy forces, terrain, or facilities through observation, photography, or electronic means

to crack a criminal case or uncover a plot; to investigate and solve a crime

Abbreviation for [[刑事侦查|刑事偵查|xing2 shi4 zhen1 cha2]]; the process of gathering evidence and investigating a crime.

to officially file a case for investigation; to initiate a criminal probe or prosecution

Military aircraft equipped with cameras, radar, or other surveillance technology used to gather intelligence.

to investigate a crime and handle the legal proceedings or prosecution of the case

a soldier tasked with gathering information about enemy positions or movements; a military scout or spy

A person responsible for gathering information about an enemy or an area; scout, spy, detective, or investigator

to sense; to detect; to probe and measure

private investigator; private eye; shamus

spy satellite; a man-made satellite equipped with cameras, radar, or radio receivers used to gather military intelligence by monitoring and tracking targets from orbit

to investigate and interrogate; to question someone during a criminal investigation

A work of fiction centered on the investigation and resolution of a mysterious crime or puzzle; detective story

to investigate a crime and capture suspects; to track down and arrest criminals

to eavesdrop on, monitor, or intercept signals or conversations to gather intelligence; used especially in military or espionage contexts for tapping phones or radio signals

A police unit or search-and-arrest team responsible for investigating and solving criminal cases

having the nature of reconnaissance or investigation

to scout or gather intelligence; used in military or literary contexts

eavesdropping device; bug; detectagraph

detective story; whodunit

a device or instrument used to detect toxic chemicals or poisonous substances

a device used for detecting the presence of toxic or poisonous substances in the air or a sample

a device used to discover or measure the presence of something

to reconnoiter and defend; to investigate and prevent crimes or threats to social security

Cavalry or mounted soldiers sent out to scout or spy on enemy movements; a scouting party on horseback.

The legal process during criminal proceedings where judicial authorities investigate facts and collect evidence; often shortened to [[刑侦|刑偵|xing2 zhen1]].

(abbreviation) National Reconnaissance Office (NRO), a US intelligence agency

(Taiwan) an elite unit of prosecutors tasked with investigating major corruption and high-profile crimes involving senior officials

private detective; private eye

Investigation of economic crimes; short for [[经济犯罪侦查|經濟犯罪偵查|jing1 ji4 fan4 zui4 zhen1 cha2]]

investigation of financial or economic crimes, often conducted by specialized police departments

National Reconnaissance Office (NRO) of the United States.

The detection and measurement of radiation in a specific area