贪便宜

tān pián yi huì chī dà kuī

贪便宜会吃大亏。

Gain petty advantages only to suffer heavy losses.

rú guǒ zhè ge ài tān pián yi de rén shì nǐ de hǎo péng you nǐ kě yǐ gěi tā yī gè jī huì gǎi zhèng

如果这个爱贪便宜的人是你的好朋友，你可以给他一个机会改正。

If your close friend is a moocher, you may want to give him a chance to change.