This is the 6601st most frequent Chinese word.
暗访
"暗访" means "covert investigation" or "undercover visit."
In this sentence, "暗访" refers to a secret visit or investigation done discreetly by the police to gather information about the case.
警察进行了一次暗访，以调查案件的真相。
The police conducted a covert visit to investigate the truth of the case.
In this context, "暗访" involves a reporter doing an undercover visit to observe or investigate certain conditions discreetly.
记者准备暗访餐馆，以查明食品卫生问题。
The reporter plans to conduct a covert visit to investigate food hygiene issues in the restaurant.
Here, "暗访" indicates a covert assessment or inspection performed by persons from the headquarters to evaluate the branch's operations.