... Shaking his head slightly, he immediately explained to Vien Thieu and the others: "Master, Y Kinh City used to have tens of thousands of households, now there are nearly ten thousand people stationed in the city. The amount of firewood consumed is huge. The days are incalculable. If our army can surround the city and cut off the firewood in the city, then in a few days, the houses in the city will have to be demolished to get firewood for cooking and heating. , and as a result, morale in Yijing will certainly decline…” ,