Alright, time to revive this discussion and pray to god that my sins will be forgiven.
UNIVERSAL ENERGY SYSTEM
The Universal Energy System of Genshin is elementary energy wielded by allogenes and adepti energy is a variant of the UES.
As stated by the messages shown above, Qiqi's ability all has the term "Adepti Energy" in it and adding to the fact that Qiqi is also an adepti, we can confirm that adeptal power is a type of energy part of the Universal Energy System of Genshin. Waijing is a method of sub-space creation that allows the user to create pocket dimensions out of their imagination.
Sub-Space Creation or Waijing (Chinese: 外景 Wàijǐng, "Outdoor Scene")[1] is an adeptal ability used to create small, autonomous pocket worlds through imagination.[1][2] This technique also be used to create larger abodes, such as the Realm of Clouds[3] and the Sea Gazer's Abode.[4][5] This...
genshin-impact.fandom.com
This ability was a blessing from
Rex Lapis and has been used during troubling times for some brief respite.
[3] Even though it is a powerful adeptal ability, it does have limitations: one cannot build a whole city inside, since it is not a true world.
[4]
From the description above, we can conclude that Waijing is an adeptal ability and therefore functions through the harness of adeptal energy.
The doubts about the legitimacy of this ability bases on the concept of it being "imaginary" and the realm itself is not supposed to be real. However, I'm not arguing for the destruction of its space and time but for the star contained in the realm.
The Serenitea Pot or Realm Within (colloquially also known as Teapot, Housing, Homeland, or Player Housing) is a system in Genshin Impact that allows the player to create their own home. Players interact with the system using a gadget of the same name. Players can request to visit their friend's...
genshin-impact.fandom.com
The Serenitea Pot is a pocket dimension created through "Waijing", and all of the materials contained in the realm is all real and tangible despite the realm itself being "fake".
The Serenitea Pot or Realm Within (colloquially also known as Teapot, Housing, Homeland, or Player Housing) is a system in Genshin Impact that allows the player to create their own home. Players interact with the system using a gadget of the same name. Players can request to visit their friend's...
genshin-impact.fandom.com
As we see from that section of the article, the Traveler can create furnishing materials out of resources harvested from Teyvat (which is Genshin's main world, therefore it's real).
The Traveler can stand, run, and pretty much move freely around the realm and interact with the tangible matter in the realm.
Logically speaking, all of the furnishing material inside of the realm can be inferred as "tangible" and for it to interact with the Earth inside the realm, the ground has to be tangible as well. Therefore, if the Earth is tangible then the star of the realm has to be tangible as well.
Another doubt is that the "star" within the realm isn't an actual star, but rather a light source which well... I don't have much to counteract with that. Many people would juxtapose the "sun" in the realm and the light source in Enkanomiya. However, if you watch closely many parts of Enkanomiya are quite dark compared to many well-lightened places on Earth not to mention the entire territory is underground.
And not even the entirety of Enkanomiya is lightened. So we can conclude that the light source in Enkanomiya isn't entirely the same as the "sun" in the sub-space pocket dimensions, visually speaking. And logically speaking, we wouldn't consider a star that lights up a planet not to be a star which also applies to this case, where the "sun" of the realm not being the size of a star is less likely.
Haxes for Nahida and Il Dottore
I currently have nothing major to clarify on that and much of it has been explained on the main OP of this thread.
@Amost6x @Giannysmag @Aether2734 @DarkGrath @Qawsedf234 @Planck69 @DarkDragonMedeus
Not rejected, I just gave up and restarted again.