Correct

神不知,鬼不觉

/ shén bùzhī, guǐ bù jiào /
Strokes

Example

Definition

unknown to god or ghost—without anybody knowing it; without anybody being aware of; with great secrecy

1
shén
zhī
不知
  
,
guǐ
jiào
不觉
yíng
赢得
le
de
àiqíng
爱情
  

He has insidiously wormed his way into her heart.