Noun + 上
上 (shàng) can function as a verb meaning "to go up" or as a postposition meaning "on" or "upon." When used after a noun, it indicates a surface, domain, or aspect related to that noun. For example, 问题上 means "on the issue of" or "regarding the matter."
会议上大家讨论了很多方案。
Huìyì shàng dàjiā tǎolùn le hěn duō fāng'àn.
Everyone discussed many proposals at the meeting.
这个问题上我们的看法不太一样。
Zhège wèntí shàng wǒmen de kànfǎ bù tài yīyàng.
We have somewhat different views on this issue.
工作上她从来不怕吃苦。
Gōngzuò shàng tā cónglái bù pà chīkǔ.
She is never afraid of hardship when it comes to work.