Breaking through a Small Realm was, in general, not difficult at all as long as one had accumulated enough energy.
Of course, those with dull aptitude or exhausted potential would certainly be excluded from the general case.
As for Chen Hai, although he hadn't undergone specific testing, whether it was potential or aptitude, he was absolutely terrifyingly high.
After stepping into the Mid Period of the Heavenly Immortal Realm, although he didn't experience the accumulation of time, when it came to his real savings, he was definitely not weaker than other Heavenly Immortals in Mid Period.
Sitting cross-legged on the ground, he tried to break through to the Late Period of the Heavenly Immortal Realm. In just less than two days, he succeeded smoothly and easily broke the barrier.
"Is this the Late Period of Heavenly Immortal? Aside from feeling a tighter connection with heaven and earth, it seems that the increase in combat power isn't very significant!"