The disappearance of the sun wouldn't really surprise many.
It would make people wary and shoked to the core though! Xue Ren wasn't worried about others coming here though as he was already bringing the real sun into his world. The Mother Sun was pretty much in love with him yet she couldn't really tell.
All she knew that Xue Ren had a good impact on her and her divinity - Sun Shuria.
The fact that he has a throne powers is also important which means he is the last human to save their universe. The lady melted with Xue Ren by going for the deep kiss, then the real sun entered Xue Ren's world.
Mother Sun and Sun Shuria then utilized their powers.
They took the sun worlds to Xue Ren's world.
But can it be still called the world? There were a few worlds already, so Xue Ren had his own universe here! The sweet time with the three gorgeous ladies also made him reach the seven winged state, so his powers expanded.