A small favor in exchange for an Aslan Admiral's personal debt was extremely worthwhile.
Three days were really short, but for the people in the training camp, it meant that they had improved by leaps and bounds. They were all going through a transformation, and each and every day was precious. Especially for Zhang Shan.
Winning battles gave Zhang Shan confidence as well as fame. Nobody dared to say that he was there just by fortune anymore. Atos, on the other end, was utterly embarrassed. Many couldn't put up with his bad temper, saying he was not suited for a team. Plus, he was way too petty, bearing grudges over little things for a long time.
Failure was nothing to be afraid of. Hard work could make up for things, and people who worked hard after failing were definitely much more respectable. However, in subsequent training sessions, Atos was lazy and uncooperative, making the Moon team feel helpless.