The fist contained a pure strength of Alex's body. Although he didn't use his Spiritual Energy or his Immovable Step, it was still very powerful.
"400"
When Charya saw the number, she was dumbfounded. Back then, when she fought Alex, the number should not this. Alex's strength was far weaker. It should be around a hundred bull strength. And he didn't use his Spiritual Energy too.
Before Charya recovered from her shock, Alex tried it once again. But this time, he added his Spiritual Energy.
"500"
With his Spiritual Energy, he can add another one hundred bull strength or a thousand kilograms on the weight of his fist. He was unsatisfied with this. He tried it once again, but this time he added his 'Immovable Step'. The strength that came from Immovable Step gave him another boost equal to his current power.
"900"