Yes he know but pretend not to know to protect her.
Okay, I really hope because he pretended not to know she misunderstood and distanced herself from him, fearing what will happen when he finds out her her real name.
I had a feeling she might be his sister since she is the princess and he is the crown prince, but I was not sure It does not come as a surprise to be that lou ming xi likes her
A question for someone who read the novel these words "My heart has been moved by a woman named Ren Anle, but in this life, I will protect Di Ziyuan. Ren Anle, you must always remember these words" does it mean the ML does not know the FL identify.
Please let there be a second couple because if there is not then what I think might happen will happen. (I have not read the novel so I am making an inference about what I think from looking at the cast).
I have not watched a kdrama since AOS finished.
https://ladymanga.com/manga/hidden-love/