San Cun Ding's Counterattack Starts with a Bowl of Arsenic

[Water Margin + War + Machiavellian Strategy + No System] At the beginning, he traveled through time and became Wu Dalang, who was selling cooking cakes. According to the "story", he should be in Yanggu County at this time. I am Wu Dalang. I'm taking medicine. Then that mouthful I just swallowed... Was arsenic. It's over. It's just started and it's about to end?