Nationality/Descriptor + 人
The noun 人 (rén) means 'person' or 'people' and is one of the most fundamental words in Chinese. It can stand alone or combine with other characters to form compound words like 美国人 (American) or 工人 (worker), and it serves as a general classifier for people in certain contexts.
今天来了很多人,会议室都坐满了。
jīntiān lái le hěn duō rén, huìyìshì dōu zuò mǎn le.
A lot of people came today, and the meeting room is completely full.
他是一个非常热心的人,总是愿意帮助别人。
tā shì yí ge fēicháng rèxīn de rén, zǒngshì yuànyì bāngzhù biéren.
He is a very warm-hearted person who is always willing to help others.
美国人过感恩节的时候通常会吃火鸡。
Měiguó rén guò Gǎn'ēnjié de shíhou tōngcháng huì chī huǒjī.
Americans usually eat turkey when celebrating Thanksgiving.