The imperial palace
Everything was fuzzy when Su Liya woke, she found herself looking up at the Embroidered overheard curtain of a traditional Chinese wooden bed. Su Liya had been stuck in this fictional world for months and the only way she could afford this luxury of look up at an Embroidered bed curtain was when lying on Zhu Fengyin's bed.
She had transmigrated into the body of Su Liya, who was only a maid. In this century only the wealthy could afford such a bed, since she remembered getting hit behind her head while searching for Zhu Fengyin's handkerchief waking up to such a view was weird.
It was too far fetched for her to assume that whoever knocked her out returned her to the Duke mansion and even if they did, the maids room at the Duke mansion didn't have a bed as luxurious as this. No maids quarters had a bed like this, such luxuries were left for the masters.