•Both female leads are the clever, strong and mature breed complete with "overly loyal sister-like maid" sidekick
•Both women are fighting for survival in an environment that is against their odds
•Both have a male lead who openly loves and favors the female lead which results in calamity
•Both dramas have the leads constantly fighting off schemes from other jealous female antagonists
•Both have some maids/eunuchs who are corrupt or betray
•Both shows have beautiful costumes and scenery

DISCLAIMER: Ruyi takes place in an actual royal harem in a totally different period and THERE IS NO REVENGE PLOT/IDENTITY THEFT. Also the male lead in Weiyoung is 100 TIMES BETTER than the one in Ruyi character wise.

Both have:
-older/strong/unfashionable female lead
-hate/love relationship
-similar humour/comic relief scenes
-rival girl is both pretty & lowkey has issues
-"man candy" character (Daniel Henney..<3)
[note: there might be a slight age gap]