3 sentences

1. 古人认为在忌日出行是不吉利的。

   gǔ​rén rèn​wéi zài jì​rì chū​xíng shì bù jí​lì de.

   The ancients believed it was unlucky to travel on the anniversary of a relative's death.

   Source: Dong Chinese Dictionary

2. 红色在中国文化中被认为是非常吉利的颜色。

   hóng​sè zài Zhōng​guó wén​huà zhōng bèi rèn​wéi shì fēi​cháng jí​lì de yán​sè.

   Red is considered a very lucky color in Chinese culture.

   Source: Dong Chinese Dictionary

3. 他最近买了一辆吉利轿车。

   tā zuì​jìn mǎi le yī liàng Jí​lì jiào​chē.

   He recently bought a Geely car.

   Source: Dong Chinese Dictionary