How hard was Shi Xiaobai's right fist was a question even Shi Xiaobai himself did not know.
After having eaten countless gigantic black scorpions and steel rhinoceroses over the desolate desert, his physique had been greatly enhanced. After that, he had eaten the Transcendence Holy Tree's mysterious fruit. After half a day of digestion, his physical strength had a significant and qualitative improvement.
And most importantly, Shi Xiaobai's right hand had previously been sealed as a result of the Absolute Choice's punishment. During the seal, 'This Turtle Is Hardest' was constantly activated. Therefore, after twelve hours, Shi Xiaobai's right hand was already so hard that it could withstand a 'Turtle-speed Divine Punch' that gathered power for thirty minutes.
With all three factors compounded with each other, Shi Xiaobai's right arm could really be called a Qilin's arm. His right fist was so hard that it was appalling.