The sudden breakthrough of the two men wasn't really a surprise as they had both accumulated a decent foundation; one being the current real estate boss of the camp, the contractor—Zhang Dahai, also known as Engineer Zhang.
Inside the camp, the fences, temporary buildings, reservoirs, and water channels had all been organized and built by Zhang Dahai. Even though he shifted from a combat role to an engineering one, his professional alignment allowed him to contribute significantly, and he amassed a large number of contribution points as well.
As a result, the resources Zhang Dahai exchanged were not inconsiderable. Under the constant mutation of meat corpses, he quickly reached his limit.
Guo Gang had responsibilities in fleet management and support in battles. He did not work any less than Zhang Dahai and had been with Su Han for a long time, so in terms of resource exchange, he was not much inferior to Zhu Xiong and the others.