The Ascent of Ling Yun

Both are mini dramas in which the powerless, lower class FL schemes and plots her way through the royal harem in order to accomplish her goal. Both MLs have loved the FL since childhood but she keeps them at arms length.

Similar to Wei Ying Lou, palace maid Ling Yun enters the palace to get revenge. Even though their motives are different, their methods of getting revenge is the same. If you’re looking for similar show but in short form Hou Gong Ling Yun Chu An is a great substitute