That's right, aside from Tan Yaohua himself, China also needs Wilson.
Tan Yaohua had not been on Angel Island consistently, although he would visit annually. In general, his stay on the island was brief, and matters related to Angel Island that required his attention were typically handled through Wilson.
Moreover, Wilson controlled most of the Angels under Tan Yaohua's command, which enabled him to confront Dan Musheng on the island.
One could say that gaining control over Wilson would truly sever all of Tan Yaohua's escape routes.
Otherwise, should Tan Yaohua make it to Angel Island and establish contact with Wilson, no one could contain him. Tan Yaohua might even attempt to seize control of Angel Island openly because of these events.
While the chaos on Angel Island could be beneficial to all, controlling Wilson and becoming a participant would be even more advantageous for China.
