Correct

下笔

/ xiàbǐ / 
Strokes

Definition

to put pen to paper

Example

As a Verb

put pen to paper; begin to write or paint

1
Nǐ
你
xiǎng
想
hǎo
好
le
了
zài
再
xiàbǐ
下笔
  
。

Think it out before you put pen to paper.

2
Bùzhī
不知
rúhé
如何
xiàbǐ
下笔
  
。

I don't know how to begin to write.