A relative clause can be a verb or a verbal phrase.
李:昨天我家有一个派对。
lǐ :zuó tiān wǒ jiā yǒu yī gè pài duì 。
Li: Yesterday there was a party at my house.
王:哦,是吗?来的人多不多?
wáng :ò ,shì ma ?lái de rén duō bú duō ?
Wang: Oh, is that so? Were there many people who came (to your party)?
喜欢看中国电影的人应该学中文。
xǐ huān kàn zhōng guó diàn yǐng de rén yīng gāi xué zhōng wén 。
People who like to see Chinese movies should study Chinese.
昨天跟我去看电影的那个女孩子是我妹妹。
zuó tiān gēn wǒ qù kàn diàn yǐng de nà gè nǚ hái zǐ shì wǒ mèi mèi 。
The girl who went to see a movie with me yesterday was my younger sister.
[1] Yip, P. C., Rimmington, D., Xiaoming, Z., & Henson, R. (2009). Basic Chinese: a grammar and workbook. Taylor & Francis.