Correct

在先

/ zàixiān / 
Strokes

Definition

to come first/previous/prior/beforehand/first/formerly

Example

As an Adverb

formerly; before; in the past

1
Zàixiān
在先
wǒ
我
niánjì
年纪
xiǎo
小
  
,
shénme
什么
shì
事
yě
也
bù
不
míngbái
明白
  
。

I was very young then and could hardly understand what was happening around me.

As an Adverb

beforehand; in advance

2
Bùlùn
不论
zuò
做
shénme
什么
shì
事
  
,
zàixiān
在先
dōu
都
yào
要
yǒu
有
gè
个
zhǔnbèi
准备
  
。

Whatever you do, be sure to get prepared in advance.