Inside the private room where the group of Liu Yang was when William Kids entered the room, he was surprised by what he saw. He never imagined that he would find another person from his former tribe, but her situation was the same as his, the two became slaves
Liu Yang just removed the control magic that William Kids had in his body, he managed to feel free again. This action shocked everyone, including William Kids, no one imagined that Liu Yang would release a slave he had just bought for ten thousand gold coins casually.
William Kids thought that Liu Yang was doing a favor at Jane's request, but Liu Yang's words made him rethink.
Liu Yang released him because he wanted to see where William Kids would reach with his own power. Liu Yang gave him a challenge, which was to become powerful enough to conquer this city.