心急吃不了热豆腐 (xīn jí chī bù liǎo rè dòufu ) ,the direct meaning of the phrase is impatient could not eat hot tofu.It is expressed as haste makes waste.

For example:

Xuéxí wàiyǔ yào yǒu nàixīn，bùrán xīnjí chībùliǎo rèdòufǔ.
学习外语要有耐心，不然心急吃不了热豆腐。
Learning foreign language needs patience.Haste makes waste.