Wei Wenzhong's little calculation

Dingbei! "Great victory! Great victory in Shuofang!" The messenger with three red flags on his back rushed into the west gate of Dingbei at a rapid speed. Hearing what the messenger shouted, the soldiers guarding the city immediately started talking again. "Another great victory in Shuofang?" "No way?" "Maybe it's a repeat of the great victory we had earlier?" "How is that possible? It's been more than ten days since that great victory! It's impossible for the news to be repeated after such...