1 sentence

1. 为了增加趣味性，作者在第二章引入了一个神秘角色。

   wèi​le zēng​jiā qù​wèi​xìng, zuò​zhě zài dì'èr zhāng yǐn​rù le yī gè shén​mì jué​sè.

   To add an element of interest, the author introduced a mysterious character in the second chapter.

   Source: Dong Chinese Dictionary