The Star River Era! The Dimensional Freedom Demon

[An invincible protagonist, a satisfying read. Except for the second volume, which might be slightly less satisfying, the rest of the story is all about rampaging through everything and crushing everything in sight. Otherwise, I'd give it a bad review.]
Having transmigrated to the Interstellar Federation, Ji Chen, an ordinary person, didn't get to enjoy the benefits of advanced civilization. Instead, he was given a spot to immigrate to the Federation's borderlands.
Ji Chen: 666, the sweetness of interstellar society doesn't include me, but the harshness of the borderlands doesn't make me forget you.
What else is there to say? Hang it up!
So you want to fill the borderlands? I'll just let the Heavenly Demons nurture all realms. The alien races and evil gods are rampant in the borderlands, but Ji Chen will seize them and refine them in an instant.
Years later, the Supreme Free Demon King, the Primordial Chaos Great Heavenly Venerable, attained enlightenment in the borderlands of the Federation.
Abridged version of the old introduction:
Human civilization has been exploring the stars for tens of thousands of years, and its territory spans across the Milky Way.
The human civilization of the Star River Era was extraordinary, with its influence reaching across the cosmos and even across dimensions, attempting to set foot in other multiverses.
Starships, mechs, psionic energy, genetic evolution, superpowers...
However, such a powerful human civilization is not without its worries; alien civilizations and cosmic evil gods have never stopped spying on humanity.
Just as Ji Chen was preparing to relax and enjoy the benefits of interstellar society, bad luck struck, and he was forced to immigrate to a dangerous, desolate planet.
Ji Chen: Oh no, we've been set up by the capital.
Okay
[Abnormal dimensional spatial perturbation detected]
[The juvenile form of the Dimensional Demon is ready]
[Adapting to the fundamental laws of the multiverse, it has automatically acquired idealistic adaptability!]
[Capturing coordinates of an alternate dimension]
...
The World of Qi and Blood Martial Arts (Anti-Qing)
A post-apocalyptic world of evolution (mythical beasts, adaptive evolution)
The World of Cultivation (Human Emperor's Banner, Establishing the Immortal Dynasty)