Though they called it sparring, the two were in a real fight.
Each of Brother Lanxi's hand chops hit Moses's muscles squarely, producing a series of popping sounds.
Upon closer look, one could see that Brother Moses's hard, massive muscles were quivering like jelly.
It seemed very painful, but Moses seemed to enjoy it. This showed that Brother Lanxi's comment about the fourth brother liking to get hit was not an exaggeration.
Casio was watching from the sidelines, distinguishing the differences in their fighting styles. One was strong, defensive, and slow to attack.
The other was quick to attack, good at evading, but lacked strength.
Of course, when it comes to the "slow in attacking" and "lack of strength", it's all relative. If an average muscular man were to be hit by Brother Lanxi's hand chop, he would probably be done for.
After two or three minutes, the two men gradually stopped fighting.