Phono-semantic — one part hints at the meaning, another at the sound
Example phrases
因为老师临时请假,这节课安排在周六补课。Yīnwèi lǎoshī línshí qǐngjià, zhè jié kè ānpái zài Zhōuliù bǔkè.Because the teacher asked for leave at short notice, this lesson has been arranged as a make-up class on Saturday.
他生病请了三天假,回来后要补课。Tā shēngbìng qǐng le sān tiān jià, huílái hòu yào bǔkè.He was ill and took three days off, so he has to make up the lessons when he comes back.
周末老师留在教室里给同学们补课。Zhōumò lǎoshī liú zài jiàoshì lǐ gěi tóngxuémen bǔkè.At the weekend the teacher stays in the classroom to give the students a make-up lesson.