1 sentence

1. 别担心，计时器将在您打开此信件时开始。

   bié dān xīn, jì​shí​qì jiāng zài nín dǎ kāi cǐ xìn​jiàn shí kāi​shǐ.

   Don’t worry, the timer will start when you open this letter.

   Source: CCMatrix