3 sentences

1. 这位歌手在年轻人中拥有极高的人气。

   zhè wèi gē​shǒu zài nián​qīng​rén zhōng yōng​yǒu jí gāo de rén​qì.

   This singer is extremely popular among young people.

   Source: Dong Chinese Dictionary

2. 这本小说由于人气太低，写到一半就太监了。

   zhè běn xiǎo​shuō yóu​yú rén​qì tài dī, xiě dào yī​bàn jiù tài​jiàn le.

   Because of its low popularity, this novel was dropped halfway through.

   Source: Dong Chinese Dictionary

3. 这间老房子很久没人住了，一点人气都没有。

   zhè jiān lǎo fáng​zi hěn jiǔ méi rén zhù le, yī​diǎn rén​qì dōu méi​yǒu.

   This old house hasn't been lived in for a long time; it has no life in it at all.

   Source: Dong Chinese Dictionary