Tā cóngxiǎo jiù ài kàn tàn'àn xiǎoshuō, zhǎngdà hòu dāng le jǐngchá.
He loved detective stories as a boy and became a police officer when he grew up.
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The Sherlock Holmes stories are known in Chinese as 《福尔摩斯探案集》, "The Collected Cases of Sherlock Holmes", and 探案 became the stock word for detective fiction and crime dramas.