这个班是中级班，不是初级班。

Zhège bān shì zhōngjí bān, bú shì chūjí bān.

This class is an intermediate class, not a beginner class.

这本书对中级学习者很有帮助。

Zhè běn shū duì zhōngjí xuéxízhě hěn yǒu bāngzhù.

This book is very helpful for intermediate learners.

想进中级班，你先要参加一个小考试。

Xiǎng jìn zhōngjí bān, nǐ xiān yào cānjiā yí gè xiǎo kǎoshì.

If you want to enter the intermediate class, you first need to take a small test.