For those last two attacks, Chen Chuan had used a special technique taught to him by Chen Bitong, one designed specifically to strike large creatures.
These creatures possessed incredibly tough Mutated Organizations inside their bodies, requiring immense destructive power to kill in a single blow.
The only downside was that this technique required a period of charging up before it could be unleashed, making it completely impractical against ordinary Fighters—you'd never get the chance.
However, he could also use it without charging. Charging was necessary for two reasons: one, if the Mutated Organization's coverage was limited and one needed time to mobilize more of it; and two, to protect oneself from the recoil damage of the impact.
But his Mutated Organization coverage was comprehensive, and he could also use his Second Self to transfer away any damage, so he had thrown those two punches without a shred of hesitation.
