警察扣留了他的证件。
The police detained his documents.
to detain sb; to hold sb against their will; to withhold (property, documents, funds etc)
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
警察扣留了他的证件。
The police detained his documents.
海关扣留了可疑物品。
Customs detained the suspicious goods.