The Mysterious Businessman on the Treacherous Sea

When they woke up, all humans on the earth entered an endless sea called the Mysterious Sea to survive. Each human being started with a raft, and other things were obtained by their own abilities... But when Zhong Zhou was just transported into the Mysterious Sea, he accidentally awakened the mysterious merchant system, and relied on this system to sell supplies everywhere in the Mysterious Sea. From then on, he became a legend in the hearts of every human being living in the Mysterious Sea... Ps: The protagonist's personality is relatively unstable. Sometimes he is very cool, sometimes he is timid, and sometimes he is brave. Anyway, he is very changeable. If you see the protagonist talking arrogantly one second, and then you see the protagonist being timid the next second, please don't be offended.