好好学习

You can use it as a standalone command. You can also pair it with its famous partner 天天向上. It usually functions as a verb phrase. Just drop it into a sentence when someone is heading to class. It is simple, punchy, and very easy to remember. Even beginners can sound like a local with this one.

Use it when your friend has a big exam coming up. Use it when your child is dilly-dallying with their homework. It is perfect for a supportive text message. You might hear it in a graduation speech. It also works when you are joking about your own lack of focus. It is the ultimate 'back-to-school' vibe.

Don't use it with your boss. It might sound like you are telling them they are incompetent. Avoid it in high-stakes romantic moments unless you want to kill the mood. It is too academic for a first date. Don't use it if someone is clearly burnt out. They need a nap, not a lecture on studying.

This phrase is part of a famous slogan by Mao Zedong. The full version is 好好学习，天天向上. It translates to 'Study hard and improve every day.' Every Chinese student grew up seeing this on classroom walls. It represents the deep cultural value placed on education. It is a nostalgic pillar of Chinese childhood.

The most common variation is the full eight-character slogan. Young people sometimes use the Chinglish version 'Good Good Study, Day Day Up.' This is a playful nod to the literal translation. You might also hear 好好读书 (hǎo hǎo dú shū). This specifically refers to reading or formal schooling. Both carry that same 'do your best' energy.