2 sentences for 正统 (zhèng​tǒng — legitimate)

1. 他是皇室的正统继承人。

   tā shì huáng​shì de zhèng​tǒng jì​chéng​rén.

   He is the legitimate heir to the royal family.

   Source: Dong Chinese Dictionary

2. 武则天是中国历史上唯一的正统女皇帝。

   Wǔ Zé​tiān shì Zhōng​guó lì​shǐ shàng wéi​yī de zhèng​tǒng nǚ huáng​dì.

   Wu Zetian was the only legitimate female emperor in Chinese history.

   Source: Dong Chinese Dictionary