Similarities
- Gives us severe first-lead syndrome
- Love square, involving the royal family
- Female lead's love rival is the second male lead's wife
- Mongols take up a fair portion of the plot

Watch this if you're interested in Khitan culture.

Both dramas depict the relationship between the Han and the Khitans, and cross-culture romance, but in different eras. One takes place during Tang Dynasty, while the other takes place during Liao Dynasty / Northern Song Dynasty.

Similarities
- A group of ancient men time-travel forward to the modern-day.
- They're all servants of the Crown Prince.
- They find the Crown Princess's reincarnation and solve the mystery of her identity.
- Main character falls in love with a girl from modern-day.

Both are about a straight male that eventually falls in love with a female scholar cross-dresser whom he thought was male the whole time.

Both revolve around a top-tier player of a multiplayer online video game, known for his skills and new achievements throughout the series. In both series, he turns down the offer to work at a famous gaming company.

Both dramas take place in the same era and depict the ongoing war between the Song Kingdom and Liao Kingdom.

In which the main character unintentionally forgets about the past.

Both main male character avoids his girlfriend so she won't be sad when he dies. Both are very sad and emotional.

Main character abandons her fiance when she falls in love with one of her students.

In both, tthe husband/wife falls in love with the kind imposter while the real one tries to murder the imposter.

Both deal with the pure love story between the rich and poor who broke up because of their parents. They meet years later and still have feelings for each other.

Both series expand on one of the male roles who is in love with his older brother's girlfriend, but gets friendzoned.