I found the first few episodes to be remarkabley similar!
They both feature desert scenes where one person saves the other.
Both MLs also hide their true identity and both FLs are princesses.
Both also have a marriage alliance and devoted MLs.
Definitely recommend if you're looking for a drama to fill the gap after Princess Jieyou or Goodbye my princess.
Similar story line. FL , although likes ML, gets married to the King and sacrifices her love for the nation while the ML always supports her. so close yet so far.
Both have good leading character female leads . Also revolves around both leads love triangle but end up making sacrifices for the nation. They are yet similar but different at the same time and have a very different story line. Where The Princess Wei Young revolves around mainly 1 dynasty where as Princess Jieyou revolves around alliances with neighboring countries/dynasties .