5 sentences

1. 绝不能触碰法律的红线。

   jué bù néng chù​pèng fǎ​lǜ de hóng​xiàn.

   One must never cross the legal red line.

   Source: Dong Chinese Dictionary

2. 切断红线！

   qiē​duàn hóng​xiàn!

   Cut the red wire!

   Source: OpenSubtitles

3. 这种触碰法律红线的玩法迟早会出事。

   zhè zhǒng chù​pèng fǎ​lǜ hóng​xiàn de wán​fǎ chí​zǎo huì chū​shì.

   This way of playing close to legal boundaries will lead to trouble sooner or later.

   Source: Dong Chinese Dictionary

4. 如果不小心碰到红线，就会触发警报系统。

   rú​guǒ bù xiǎo​xīn pèng​dào hóng​xiàn, jiù huì chù​fā jǐng​bào xì​tǒng.

   Accidentally crossing the line will trigger the alarm system.

   Source: Dong Chinese Dictionary

5. 身为财务人员，严守职业底线，绝不能触碰红线。

   shēn​wéi cái​wù rén​yuán, yán​shǒu zhí​yè dǐ​xiàn, jué bù​néng chù​pèng hóng​xiàn.

   As a financial professional, one must strictly uphold professional standards and never cross the red line.

   Source: Dong Chinese Dictionary