Examples
zhè这jiù shì就是tā他yòng lái用来qiān shǔ签署nà那fèn份wén jiàn文件de的bǐ笔le了。
这就是他用来签署那份文件的笔了。
This is the pen that he signed the document with.
我签署了文件。
I attached my signature to the document.
1978年中国和日本签署了和平条约。
In 1978 a peace treaty was concluded between Japan and China.