Scarlet Heart

Quiet and gentle, Min Jae Yi is everything a good daughter of a prominent family should be. Engaged to the son of the Second State Councillor, Jae Yi knows that the only way to bring herself and her family honor is to accept her fate, which she does with grace and charm. Devoting herself to learning everything she needs to know to become a good wife and mother, Jae Yi dutifully prepares for the future. Sadly, destiny has other plans for her future. Four days before her wedding, Jae Yi’s family is murdered. With no one else to blame for the unexpected tragedy, Jae Yi soon finds herself the object of baseless and horrifying accusations. Blamed for the death of her family, Jae Yi might not have had much of a future at all, if fate hadn’t decided to intervene. Bringing the lonely crown prince, Lee Hwan into her life at just the right moment, Jae Yi is saved from a dismal fate, but her salvation comes at a price. Plagued by a mysterious curse, Lee Hwan agrees to help Jae Yi, but only if she agrees to help him break his curse in return. Unable to refuse such an offer, Jae Yi agrees to the prince’s terms, setting them both on an unexpected path toward love. But what chance does their love have of surviving when one of them is a former murder suspect and the other is a cursed prince?

They both have Cecilia liu the amazing female lead
Setting is historical
Time travel n Cecilia is trying to help her lover
Plus they're both amazing dramas

Both are quite gloomy Chinese stories about the Fl's fate, her taking part in the palace power struggle and her foresight

They have a similar time traveling theme since in both of them, a girl goes to the past. Both of them also have gorgeous costumes/clothes, especially the female characters. Although, Startling By Each Step is a bit more serious and, in my opinion, has better acting.

Scarlet Heart is set during the reign of Kangxi ( 1661 – 1722) while Rule the World is set at beginning of Qing Dynasty. The male lead is Huang Taiji (the first actual Emperor of Qing Dynasty ) while his father is Nurhaci, is the founder of Qing Dynasty.

Scarlet Heart and Rule the World have a similar plot: a woman who goes back in times and gets entangled with the princes of the reigning dynasty.
So if you like the first drama, you could like also the second.

Wang Won’s father is the king of Goryeo while his mother is the Yuan emperor’s daughter. He was born with many gifts as he has good looks, the wisdom of a snake, and a magnetic personality that draws people to him. But behind his gentle, virtuous demeanor, he has ambitions to conquer other lands. He has a faithful friend named Rin, who is a royal cousin and comrade with the same ambitions as he does. Then Wang Won has an encounter with a young woman named, San. San was someone that he recalled having met when he was a child and was lodged in his mind ever since. Wang Won sees how bright and confident San is and befriends her as well. But this friendship plants the seeds of tragedy. San’s beauty mesmerizes both Won and Rin and their seemingly strong bond start to fray over one woman

Both have the same couple as the main actors, the chemistry is on point bc they are married in real life, Incisive Great Teacher is way more lighthearted and funny though

Tight political and historical plot, with revenge, machinations, factions and behind door complots. One is male centered drama, the other is female centered.

Time travel and the tragic feeling of being a passerby in someone else's destiny. Shen Buyan is the male version of Ruoxi. Both have epic love stories.

Both are the only shows where it's interesting from the get go( I was hooked since episode 1 for both which is rare since even popular or hyped shows takes awhile)

Second male lead loves female lead but decides to go for power, however 8th prince is more genuine and likeable while night is more for himself.

Definitely try out both shows if you're into scheming and chemistry where it's oozing out like crazy.

These dramas have past (historical) and present (morden) counterparts of the lead couple's reincarnations. It was a sad romance in historical part. Both have talented lead actors and amazing chemistry between them.

well the acting is really good in both, they are both sad only this one is more sad they involve royals

Entertaining big families that come close to heart.
The way both dramas deal with family-only dynamics is peaceful.
Full of comedy.
Heart-filling romances.
Double in-law couples.

Both dramas are set at the time of the Nine Lords' War.
Both dramas show the princes' endless scheming against each other to secure their position/reputation as a worthy crown prince/emperor to their father.
The female leads in both dramas eventually gets involved with politics and the princes - though with which prince differed between the two.
Both showcased aspects of arranged marriages, as well as marriage alliance.

Both have a time travel theme where the main female character ends up in a time when there is a fierce power struggle for the throne.