Phono-semantic — one part hints at the meaning, another at the sound
Example phrases
网络信号时好时坏,我只好改发短信。Wǎngluò xìnhào shíhǎo shíhuài, wǒ zhǐhǎo gǎi fā duǎnxìn.The internet signal comes and goes, so I have to switch to sending texts.
春天的天气时好时坏,出门要多穿点。Chūntiān de tiānqì shíhǎo shíhuài, chūmén yào duō chuān diǎn.In spring the weather keeps changing, so wear extra layers when you go out.
他的成绩时好时坏,老师很担心。Tā de chéngjì shíhǎo shíhuài, lǎoshī hěn dānxīn.His grades go up and down, and the teacher is quite worried.