Correct

油皮

/ yóu pí / 
Strokes

Example

As a Noun

outmost layer of skin epidermis

1
Wǒ
我
zhǐshì
只是
cā
擦
pò
破
le
了
yī
一
diǎn
点
yóupí
油皮
  
。

I received a mere scratch.

As a Noun

skin of soya-bean milk