Xia Yuantu is worthy of being the person who has been in charge of the Ministry of Industry, as soon as he saw the characteristics and smell of the black-brown liquid, he thought of the information about the black oil transmitted from Zhuji Town, as well as the rumors that Baqibu had recently used fire bombs to force Xia Yuanxiao back, although he had never seen the black oil, but as soon as he saw this black-brown liquid, coupled with the actions of the Japanese at this time, he immediately thought of the black oil, and he immediately ordered everyone to abandon the city and retreat.

When all the soldiers heard Xia Yuantu's roar, they were all stunned, although he didn't understand what everyone meant? But after coming back to his senses, he still began to abandon the city according to the instructions, and jumped over the wall to retreat, Xia Yuantu didn't care about walking the steps after shouting, and jumped directly from the city wall to the ground, just when Xia Yuantu ordered the soldiers to abandon the city and flee for their lives, hundreds of fireballs tied up by torches were thrown by the Japanese with catapults.

Those fire balls are particularly dazzling in the night, after the fire balls are thrown on the city wall by catapults, some are scattered into the pile of weapons, some are extinguished after hitting the ground, some fly into the open space in the city, some hit the wall and fall, and some fall into the corridor stained with black oil, when the torch meets the black oil, the flame burns instantly, because the ground of the city wall corridor is covered with black oil, so in just a few breaths, the entire city wall burns.

Because the walls and ground of the city wall were all sprinkled with black oil, so the entire corridor was covered when the flames burned, although Xia Yuantu reminded him very timely, but because the two group armies were still on the city wall to resist the enemy when they were deployed before, this also caused everyone to be unable to withdraw for a while, and when the flames burned completely from above the city wall, there were still many guards who defended the city and did not withdraw, and as a result, those people were all engulfed in flames.

"Help, help!"

"Jump off the wall, jump down and run for your life."

"Why can't this damn flame be extinguished?"

For a time, the walls were full of the painful wails of the soldiers of the battle guards, and many people were covered in flames and turned into burning people, and when they jumped from the ten-meter-high city wall, they hurried towards the pool where the water source was, but when they jumped into the pool to extinguish the fire, they discovered something that frightened everyone, that is, instead of extinguishing, the flames burned from the water.

Xia Yuantu and those battle guards who jumped over the wall in time to escape were also full of fear while rejoicing, they had only heard the name of the black oil before, but no one had seen the power of the black oil, today, they really tasted the power of the black oil, at this time there were still five legions on the thousands of meters of city wall that had not been withdrawn, in addition to 10,000 combo heavy crossbows and millions of crossbow arrows, and now these were all burned by the flames.

"Save people, save people, save those people on the wall." Xia Yuantu looked at the city wall that was burned into daylight, heard the struggles and sorrows of those soldiers before they died, and saw that the combo heavy crossbow and crossbow arrows he had worked so hard to make were all burned to ashes at this moment, Xia Yuantu's face instantly turned pale: "Heavy crossbow, my double crossbow, damn widow, I am inseparable from you." ”

After roaring this sentence, Xia Yuantu forced himself to calm down, seeing that the soldiers at this time were already in a mess, he tidied up his embarrassed clothes, and ordered all the soldiers to assemble, and after the team was re-arranged, he pointed to the flames that were still burning behind him, and roared in a sad and angry tone: "Prepare for war and avenge the dead brothers." ”