Originally, from the very beginning Pei Ji'an, Xiao Shiqing, and the emperor knew this princess was fake, but they still pretended to know nothing and brought her back.
It was to catch the person behind the scenes.
Qu Fulan was very surprised when she heard this, "How did you know the princess was fake? Without DNA, how can you determine?"
Pei Ji'an looked at her, was silent for a while, and asked, "What does 'dnah' mean?"
Qu Fulan: "...Dialect, just means evidence, don't mind these little details."
Pei Ji'an indeed didn't mind, "That only the Emperor and Nanny Lai know, no one else knows."
If too many people knew, then the fake could truly become real.
Evidently, King Jie didn't know either, otherwise, he'd have made a real one.
Or perhaps King Jie knows, but he has hidden the real one for other purposes, that's uncertain.
But what can be confirmed now is that this one is fake.
