Gu Mang lived so miserably at Red Flame and lost half of her life there. There was no way that she would be so generous. When she first came out to Red Flame, she thought of ways to mess up Red Flame almost every single day. But after spending months investigating, she could not find anything about Red Flame.
Red Flame was too powerful.
In the end, she could only accept that her skills were not as good as theirs. From then on Gu Mang started keeping a low profile. But she built up Shadow League with all of her effort and even sold herself to the Killer Alliance to get more resources.
The underground forces of the Shadow League had long been on par with the five major forces in the world. Even if Gu Mang risked her life, it was all in preparation for Red Flame.