Females that look kind of similar

https://mydramalist.com/people/10112-zheng-qiu-hong 

https://mydramalist.com/people/15613-shen-yue 

I think Zhao Lusi and Yuan Bingyan  was the same person at first lol

Vivian Sung and Lee Hyeri

Kim Yong ji and Han So-hee

and from certain angles ;

Jeon Jong-Seo and Ha Yoon-kyung.

These two don't look alike,but they could cause confusion; Lee chung-ah and Jung ryeo-won