Phono-semantic — one part hints at the meaning, another at the sound
Example phrases
山区夜里气温骤降,即使白天很热,帐篷里也要注意保暖。Shānqū yèlǐ qìwēn zhòujiàng, jíshǐ báitiān hěn rè, zhàngpéng lǐ yě yào zhùyì bǎonuǎn.In the mountains the temperature drops sharply at night, so even if it is hot during the day, you still need to keep warm in the tent.
冬天出门要戴帽子和围巾保暖。Dōngtiān chūmén yào dài màozi hé wéijīn bǎonuǎn.In winter, wear a hat and scarf when you go out to keep warm.
这件羽绒服既轻又保暖。Zhè jiàn yǔróngfú jì qīng yòu bǎonuǎn.This down jacket is both light and warm.