The dramas follow some of the same historical events that surround the succession of the Tang Dynasty from Emperor Taizong (Li Shi Min), Wu Zetian's first husband, to Emperor Gaozong (Li Zhi), Wu Zetian's second husband.

Both stories involve revenge with the main character getting close to someone because of the wrongs their family member has committed against them.

Both dramas feature a workplace romance with a career-minded woman. Family is an important part of the leads' lives.

Both series are about someone traveling back to the past and meeting their soulmate. They struggle with being with the one they love and returning back to their time.

Both series are revenge stories where the main female lead becomes the teacher of the child of the person/people she is exacting revenge against.

Both series are audition programs that follow the formation of a boy group under BMSG. Throughout the course of the show you see multiple performances of original songs and the development of the skills of the trainees.

Both stories show the bleak side of life and the people trying to survive in the midst of it poverty and crime.

Both series take place in the palace with the main female character working as a maid in the royal kitchen. The preparation and serving of food is a major component.

Both series are about a young adult falling in love with a much older individual and finding the path they want to pursue in life.

Both series are largely set in after-school cram schools were the female lead is a teacher and the male lead is her student/former student who develops feelings for her first.

Both titles are about two people suffering from their own problems but circumstances allow them to encounter one another and find solace together.

Both movies are about an LGBT parent or parents forming a bond/family with a child and the pressures/criticisms they all have to face due to the prejudice and discrimination present in society.