圈套 (quān tào): trap; snare; trick

That salesman said I could join a lucky draw just by paying 1,000 yuan. I thought it was a trap, so I ignored him.

The police set a trap, letting the thief think the warehouse was empty, and caught him red-handed when he went in to steal.

He pretended to be my friend, but actually wanted to trick me into investing. I almost fell into his trap.