1 sentence

1. 他在新年第一天启笔写下了新书的第一章。

   tā zài xīn​nián dì​yī tiān qǐ​bǐ xiě​xià le xīn shū de dì​yī zhāng.

   On the first day of the new year, he set pen to paper and wrote the first chapter of his new book.

   Source: Dong Chinese Dictionary