3 sentences

1. 长春市作为老工业基地，正在焕发新的活力。

   Cháng​chūn Shì zuò​wéi lǎo gōng​yè jī​dì, zhèng​zài huàn​fā xīn de huó​lì.

   As an old industrial base, Changchun is showing new vitality.

   Source: Dong Chinese Dictionary

2. 退休后的他重新焕发了青春，变得活力十足。

   tuì​xiū hòu de tā chóng​xīn huàn​fā le qīng​chūn, biàn de huó​lì shí​zú.

   Since retiring, he has regained his vitality and become full of energy.

   Source: Dong Chinese Dictionary

3. 夕阳下，整座城市焕发出金色的光芒。

   xī​yáng xià, zhěng zuò chéng​shì huàn​fā chū jīn​sè de guāng​máng.

   In the sunset, the entire city glows with a golden light.

   Source: Dong Chinese Dictionary