Yap.Town

信上

in the letter

→ 信
phrase Rare #32,868
in the letter 上 means “on” or “in” here, indicating something written or stated in a letter.
CH: 信上写着会议的时间。
EN: The letter says what time the meeting is.

他在信上说什么？

What does he say in the letter?

他试图把注意力集中在信上。

He tried to focus his attention on the letter.