Both dramas share a similar comedy style where the focus of the story is on multiple mains and couples, all living under one roof.

In "Hilarious Family", the story revolves around a widowed mother and her 4 daughters whom have just moved to a new town; as they attempt to settle in, the 4 daughters find themselves acclimating in their own ways that land them into trouble, but in the process, they find love unexpectedly.
In "The Happy Seven in Changan", the story follows a group of 'tenants' that find themselves living under one roof filled with heavy debts. Each member making their way to the Li manor in Changle City for different reasons, but decide to weather the storm together with the FL who is weighed down by her father's heavy debt.

Both dramas share similar plot points:
- One of the lead characters time travels or transmigrates to ancient times - in " A Puppetry" it is the ML who transmigrates into his own manhua.
- The lead characters realize they are stuck in a time-loop and work together to solve the mystery behind the sorcery.

In both dramas, the FL believes she has the perfect marriage with a devoted husband, only to discover the ML is having an extramarital affair. Both FLs ultimately decide on divorce; they devise a plan to reclaim their assets before secretly putting the plan in motion.

-Both dramas involve the public prosecutors office. The importance of their role is emphasized when it comes to uncovering the truth behind trial cases.
-In 'Black Lighthouse', intense confrontations between prosecutors and defense lawyers in the city courthouse takes place during trials where court evidence and the most minute details determine a persons acquittal or conviction.

-Both dramas involve the public prosecutors office and their importance with uncovering the truth in cases of a trial.
-In 'Black Lighthouse', intense confrontations between prosecutors and defense lawyers in the city courthouse takes place during trials where the importance of court evidence and minute details are emphasized.

Both stories share similar plot points. In the Promise of Chang'an,
- ML and FL were childhood sweethearts that fell in love with each other and pledged their love to each other.
- The FL ends up becoming betrothed and then married to the Emperor after false news had spread that the ML died on the battlefield.
- The FL is clever, literate and a good strategist so she ends up assisting the Emperor as well as helping the ML out of dire situations.
- The ML becomes a decorated commander of the battalions... a true hero who helped built and secure the nation of Great Sheng.
- The FL eventually becomes the Empress Dowager after her son has the throne passed to him following the Emperor's death.
- The ML still holds onto hope that he and the FL can have the happy ending they once dreamed of as his love for her remained unchanged in-spite of everything.

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Both dramas share similarities in the storyline and the nature of the relationship between ML & FL are the same: the FL was adopted and the ML swore to protect her. However, as they grow into teenagers, they become a bickering pair. ML develops romantic feelings for the girl who was raised to be a "sister", although they share no blood relationship. ML becomes protective and is constantly warding off all boys who get too close to his "sister".

* Both dramas share similar themes and revolve around the fashion industry.
* In both dramas, they have disgruntled engaged lovers who were presumed dead in an accident, only to return with a different identity. The misunderstandings between the couple led to the belief that their engaged lover had been unfaithful before the accidents. Due to the misunderstandings, they feel resentment, which fuels their desire for payback in their return. In both dramas, their lovers remain faithful and devoted with their love despite thinking their partner had died.
*In both dramas, one of the main characters has a younger sibling who is autistic and requires special care. Their partners have been taking care of the younger siblings as the primary guardians.
*I even believe some of the sets and shooting locations they filmed in for 'Return the World to You' were used to film "Look Up There's Starlight".