1 sentence for 国语 (Guó​yǔ — mandarin)

1. 他在家里讲家乡话，出门则讲国语。

   tā zài jiā​lǐ jiǎng jiā​xiāng​huà, chū​mén zé jiǎng Guó​yǔ.

   He speaks his hometown dialect at home and Mandarin when he's out.

   Source: Dong Chinese Dictionary