Correct

开衩

/ kāichà /
Strokes

Definition

slit (in clothing)

Example

As a Verb

make/open a vent (at the sides or back of a garment)

1
de
shàng
上衣
kāi
kāi
chà
  
?

Do you want a vent made in your coat?

2
Pángbiān
旁边
  
/
zhōngjiān
中间
kāi
chà

make a side/centre vent

As a Noun

slit; vent

3
de
páo
旗袍
liǎngbian
两边
yǒu
kāi
chà
  

Her mandarin gown has a slit/vent at each side.