Body Strengthening Realm: 4 small stages. (Muscles , tendons , bones , meridians).
Qi condensation Realm: 4 small stages. (Early, Middle, Late and Peak).
Foundation Establishment Realm: 4 small stages. (Early, Middle, Late and Peak).
Hard for more than 80% of martial arts to condense , only 20% of MA do it.
Half-step to Core formation
Core formation (Martial artist at this realm are known as 'Masters') : 4 small stages. (Early, Middle, Late and Peak).
Half-step to Nascent Soul
Nascent Soul (Martial artist at this realm are known as 'Grand Masters'): 6 stages
Very hard for a martial artist to breakthrough, only geniuses are able to pass to this stage.
They can fly , and are consider immortals in Huibin (continent.).
Pre-Celestial (Martial artist at this realm are known as 'Sages'): 6 stages
After that, well that would be spoilers :)