Zhang Shan

Oah Martinsen was originally a modern worker who died suddenly from overwork and traveled through time to become a beggar in Shanghai during the Republic of China. When he was dependent on the little beggar Xiaoqi, he accidentally discovered a warehouse and used the system storage function to obtain a large amount of supplies, but he also got into trouble. After saving the injured Su Mo, he activated the role-playing system and obtained the "Surgeon" role card.
In order to survive in the troubled times, he relied on the system's ability to help Su Mo and gradually deepened his work as an agent.