Correct

前约

/ qián yāo /
Strokes

Example

As a Noun

previous engagement/appointment

1
Fēicháng
非常
hàn
遗憾
  
,
yīn
yǒu
qián
yāo
ér
néng
jiēshòu
接受
de
shèngqíng
盛情
yāoqǐng
邀请
le
  

I regret that a previous engagement prevents me from accepting your kind invitation.