tā zhàn zài mén kǒu wàng fēng / fā xiàn yǒu mò shēng rén kào jìn jiù lì jí tōng zhī wǒ men

他站在门口望风，发现有陌生人靠近就立即通知我们。

He stood at the door keeping watch, and immediately notified us when he spotted strangers approaching.