HSK V7-9
Correct

信件

/ xìnjiàn / 
Strokes

Definition

letter (sent by mail)

Example

As a Noun
letter; mail
1
Wài
外
fā
发
xìnjiàn
信件

outgoing letter

2
Sīrén
私人
xìnjiàn
信件

personal/private letter

3
Kuàidì
快递
xìnjiàn
信件

express delivery letter

4
Jīmì
机密
xìnjiàn
信件

confidential letter

5
Gōngwù
公务
xìnjiàn
信件

office mail

6
Xìnjiànjiá
信件夹

letter case

7
Jiǎnchá
检查
xìnjiàn
信件

censor a letter

8
Fēnjiǎn
分拣
xìnjiàn
信件

sort letters

9
Fāsòng
发送
xìnjiàn
信件

dispatch/deliver letters

10
Yī
一
xiǎo
小
zhá
札
xìnjiàn
信件

a small bunch of letters