Maid's Advancement Rules

Not only did his family not fall behind to become a palace maid, but in order to survive, he had no choice but to become a princess by marriage. Lu Lun Tang didn't even have time to sigh at how ill-fated he was before he was forced to assassinate the Emperor.
How was she going to be able to walk away from control and free herself?
And in this deep palace, was there any true meaning?
Empress Sun, Imperial Concubine Zhang, all sorts of beautiful concubines and concubines.