1 sentence

1. 当时针和分针在十二点重合时，就是正午了。

   dāng shí​zhēn hé fēn​zhēn zài shí'èr diǎn chóng​hé shí, jiù shì zhèng​wǔ le.

   When the hour and minute hands overlap at twelve, it is noon.

   Source: Dong Chinese Dictionary