It took Zhang Yi only 8 months to cultivate each layer at the mortal tribulation realm levels, so after 8 months of travel, he reached the initial layer of the second level of the mortal tribulation realm.
Zhang Yi momentarily had to leave his mental energy world to pass through the celestial tribulation that every cultivator had to pass at each level of the mortal tribulation realm.
This tribulation was different from the tribulations Zhang Yi faced before, at the first level he would receive only lightning from the water element laws of this first celestial tribulation, compared to 6 lightning the same way as always.
Zhang Yi naturally went through this tribulation easily as he was used to, he felt that his qi became much purer than when he went through the other tribulations and his body refinement also improved.