4 sentences

1. 警方严厉打击不法之徒。

   jǐng​fāng yán​lì dǎ​jī bù​fǎ zhī tú.

   The police are cracking down hard on lawbreakers.

   Source: Dong Chinese Dictionary

2. 这种不法行为必须受到严惩。

   zhè zhǒng bù​fǎ xíng​wéi bì​xū shòu​dào yán​chéng.

   Such illegal behavior must be severely punished.

   Source: Dong Chinese Dictionary

3. 他的社交媒体账号被不法分子盗取了。

   tā de shè​jiāo méi​tǐ zhàng​hào bèi bù​fǎ fèn​zǐ dào​qǔ le.

   His social media account was hacked by criminals.

   Source: Dong Chinese Dictionary

4. 不法分子利用人头账户进行洗钱活动。

   bù​fǎ fèn​zǐ lì​yòng rén​tóu zhàng​hù jìn​xíng xǐ​qián huó​dòng.

   Criminals use nominee accounts for money laundering activities.

   Source: Dong Chinese Dictionary