4 sentences

1. 过年的时候，大家都会放烟花。

   guò​nián de shí​hou, dà​jiā dōu huì fàng yān​huā.

   Everyone sets off fireworks during the New Year.

   Source: Dong Chinese Dictionary

2. 过年的时候，人们在广场上燃放烟花庆祝。

   guò​nián de shí​hou, rén​men zài guǎng​chǎng shàng rán​fàng yān​huā qìng​zhù.

   During the New Year, people set off fireworks in the square to celebrate.

   Source: Dong Chinese Dictionary

3. 过年的时候，天空中到处都是美丽的烟花。

   guò​nián de shí​hou, tiān​kōng zhōng dào​chù dōu shì měi​lì de yān​huā.

   During the New Year, the sky is filled with beautiful fireworks everywhere.

   Source: Dong Chinese Dictionary

4. 他沉溺于烟花之地，不思进取。

   tā chén​nì yú yān​huā zhī dì, bù sī jìn​qǔ.

   He indulged himself in brothels and had no ambition to improve himself.

   Source: Dong Chinese Dictionary