Looking for a comic

Im looking for a smut comic where a red haired woman transmigrates (idk if this is the right word) into imperial china i believe? Shes the last concubine but makes her way up because she’s the only one who can please the emperor and they start falling in love. The empress, 2nd concubine, and prime minister all try to harm her because shes so close to the emperor and the prime minister wants to take over the crown. And that’s all I remember :p