After failing his initial Foundation Establishment, Zhou Chun rested for almost ten days.
The main purpose was to smooth out the impact on his Qihai Acupoint and to sum up the lessons learned.
Failure is the mother of success; only after experiencing failure can one better understand how to find success.
Zhou Chun concluded that his failure was mainly due to spending too much time breaking through the illusion during his first attempt, which consumed a lot of the Foundation Establishment Pill's efficacy.
Otherwise, the impact of his energy cyclone's dispersal might not have been enough to break through the protective film formed by the pill's power on the first try.
Another part of the reason was certainly issues with control during the last step of reversing the Mana vortex, without maintaining a proper rhythm.
Continuing with his next attempt at Foundation Establishment, these two points remained the difficulties he needed to overcome.