Using poison to attack poison, drinking poison to quench thirst, both are the current state of Ji Xinghe.
When you have a toothache and you're stabbed in the thigh, naturally the thigh wound hurts more. When you're bleeding profusely and on the brink of death, the toothache becomes less important, and your consciousness might even automatically ignore the previously unbearable toothache.
Choosing to charge headlong, Ji Xinghe does not feel deeper pain from the repeated fierce impacts. The Single Soldier Exoskeleton Armor provides excellent shock absorption and cushioning, illustrating the adage that even a dead camel is bigger than a horse.