2 sentences for 紧 (jǐn — strict)

1. 我父母管我管得很紧。

   wǒ fù​mǔ guǎn wǒ guǎn de hěn jǐn.

   My parents keep a very tight rein on me.

   Source: Dong Chinese Dictionary

2. 最近风声很紧，警察正在四处搜查。

   zuì​jìn fēng​shēng hěn jǐn, jǐng​chá zhèng​zài sì​chù sōu​chá.

   The heat is on lately; the police are searching everywhere.

   Source: Dong Chinese Dictionary