Phono-semantic — one part hints at the meaning, another at the sound
Example phrases
他刚到门口,负责审批的主任也凑巧从会议室出来。Tā gāng dào ménkǒu, fùzé shěnpī de zhǔrèn yě còuqiǎo cóng huìyìshì chūlái.Just as he arrived at the door, the director in charge of approval happened to come out of the meeting room.
我正想找你,你凑巧就打来了电话。Wǒ zhèng xiǎng zhǎo nǐ, nǐ còuqiǎo jiù dǎ lái le diànhuà.I was just about to look for you when you happened to call.
真凑巧,我们坐了同一班飞机。Zhēn còuqiǎo, wǒmen zuò le tóng yì bān fēijī.What a coincidence, we took the same flight.