Meng Chuan/Cultivation

There are three types of Tribulation Eminence experts. 1 Body Cultivation. 2 Essence Soul. 3 Dual Cultivation. The Tribulation Eminence stage is  divided into 9 levels with level 1 being the lowest and level 9 the highest. Every Star River System has at least one level 5 Tribulation Eminence expert while every Star region has a level 6 expert. Experts at level 7 are really rare and level 8 experts are nearly impossible to meet. Even meeting a level 7 Tribulation Eminence might not happen for most cultivators in their lifetime. After reaching Tribulation Eminence level 8 it`s mentioned that the practitioner is able to cross between different universes and travel to the future and past they are nearly immortal with a lifespan of billions of years. It's mentioned that there is no known person who ever reached Tribulation Eminence stage 9.

Half-step means one has grasped a corresponding Tribulation Law, but hasn't transcended the tribulation yet.

After the Saber Dao realm it gets difficult to place chapter and age because Meng Chuan starts to learn different Skills/ Arts that progress at different speeds. This can be seen on how long he takes to be promoted to Creation and Imperial Lord cultivation realms despite having the Soul and Law qualifications. That stems from the fact that you have to choose one Law to be your main Body and True Essence Cultivation foundation that can't be changed afterwards.

- Every art starts from unity, and reaches Heaven-Earth if one is capable enough. This form of table is really crude, and there's Saber of Nirvana.

Once a technique reaches Heaven-Earth perfection, they are further improved and codified as 'Ordinal number' Tribulation Law

His paramount technique Infinite Saber Imperial Lord perfected Heaven-Earth technique is counted as a Fifth Tribulation Law. (Fact check this for me, new readers.)

The Body Cultivation gets a bit hard to follow after the Blood Droplet stage because of Meng Chuan's break through to the Creation Realm changes his physique and he has run out of the material he used in his previous Body Cultivation Art.

After he compressed the core in his dantian at Regis Godfiend, it became a black hole, which is called Chaos Hole in the novel. His body improved by using Primordial Stones and other ways. He didn't use cosmos stone to further himself in Cosmos Body Cultivation. Divine Powers are ultimately early manifestation of one's latent talent in a certain field. Even if he didn't improve his body through this cultivation system, his Dao improved to the point he no longer had any use. As I said it's just a representation of one's latent talent.