Liu Li's reasons were simple. A strength type metahuman was only Class F and he could complete a cycle of training within 9 days. As soon as he reached Class E and acquired superhuman powers, what could Lu Shu, a strength type, do to him?
Xi Fei also mentioned that tier Ds required half a month of training but did not speak about tier E or F. That was to leave them with some pride and also to not make them lose hope.
But everyone knew clearly that the difference between tier B and F aptitude was like heaven and earth.
Although he could not do anything about Lu Shu right now, it was a matter of time before he could completely overtake him!
If nothing goes wrong, Lu Shu's aptitude was graded tier F and it would probably remain tier F forever.
As he thought about this, Liu Li was relieved. The incident just now was quite traumatic. While the rest were showing off to the other normal students, how did his showing off cause such a situation?!