From the introduction:
You didn’t think that would be the end did you? No, the world of cultivation is that of no boundaries, no ceilings, and no limits. Unlike the Three Realms, the Endless Territories is the vast cosmos filled with Chaosworlds, and beings far more powerful than you can imagine. To access this second part you must have reached the World level either in the first part, or in any other Jump visited afterwards.
As you may have already guessed, the Three Realms aren't the end all be all of this setting. Outside it's reaches lie the Endless territories, a section of the wider collection of Chaosworlds. Beyond even this, there are other territories and miscellaneous Otherverses all within what is called a Realmverse. the number of Realmverses lie in the millions, and together they form a single Gargantuan Chaosverse. One that may be under threat sooner than you may think.