2 sentences

1. 我不是你的长子吗？

   wǒ bù​shì nǐ de zhǎng​zǐ ma?

   Aren't I your eldest son?

   Source: OpenSubtitles

2. 国王的长子是王位的继承人。

   guó​wáng de zhǎng​zǐ shì wáng​wèi de jì​chéng​rén.

   The King's eldest son is the heir to the throne.

   Source: UM-Corpus: News