The battle of attack and defense of Xiangyang City is like a tug-of-war, and you come and go, and it gradually becomes a stalemate. And the situation is indeed as Tianbao expected, and it is becoming more and more unfavorable to Xiangyang City.

After several days of fighting, Xiangyang City was still firmly defended, and never gave the Mongolian army the slightest opportunity, but Fancheng, which was at the corner of Xiangyang, was already in danger.

And the old men in the court also seemed to understand that the battle of Xiangyang was related to the safety of half of the Great Song Dynasty, and it was rare that there was no usual mud and water, and several troops were recruited one after another to support them by land or water.

However, there were many good generals in the Mongol army, and Kublai Khan himself was also a battle-hardened battle, and he was ready to send reinforcements while besieging Xiangyang, and annihilated the Song army that rushed to him one by one under several major battles.

These days, Yu Tianlai did not appear on the battlefield again, but worked behind closed doors to recover from the internal injuries he suffered in the battle with Phags-pa. After several mutations in his body, his recovery power is far better than that of ordinary people, and the "Nine Turns of Ming Jade Gong" can take the essence of heaven and earth to feed himself, plus a few healing pills given by Xuzhen Creek, so his injuries recovered very quickly, and he has basically healed after a few days.

That night, Tianbao and others had been persuaded by Yu Tian and agreed to his beheading plan, and had been preparing for the implementation of this plan in recent days, the most important part of which was to help Yu Tianlai lock Kublai Khan's position in the Mongol army, so as to ensure that Yu Tianlai could be hit in one shot.

Although this matter is difficult, it is not completely unthinkable, a well-designed "dead room" successfully won the trust of Kublai Khan by virtue of the heads of several important people in Xiangyang City, and he stayed by his side day and night.

After the night of the day, the scheduled time for action finally arrived. In a house in Xiangyang City surrounded by heavy guards, Xuzhenxi looked at a behemoth in front of him and exclaimed: "Brother Tianlai's knowledge is really far beyond the reach of people, and he even thought that by magnifying the common Kong Ming lantern thousands of times, he can carry people straight to the sky!"

In a clearing in front of everyone, the thing that was used as a giant Kong Ming lantern by Xuzhuxi was naturally a hot air balloon that was really an antique-level aircraft in Yu Tian's eyes.

At this moment, the huge airbag has swelled like a ball, and the outlet above a sealed iron can hanging below is spraying a scorching flame upward, through the lower end of the airbag with a "fire cloth" made of "fire cloth" that is not afraid of high temperatures, heating and filling the air inside the airbag, so that the air in the airbag is heated and lightened, and the buoyancy of the outside air is generated by upward force. Had it not been for a tough rope hanging from a hanging basket under the airbag and tethered to a stake on the ground, the behemoth would have lifted off into the air.

Yu Tianlai was wearing an extremely strange style of clothes at this time. The one-piece suit was pitch black, with a large piece of fabric on each side of his body connecting his arms to his legs, and a piece of fabric connecting his legs, and if he stretched out his arms and spread his legs apart, he would be a flying squirrel that could glide at low altitudes.

As a master who has reached the pinnacle of extreme sports in a world, "wingsuit flight" is naturally a sport that Yu Tianlai has long been familiar with. Now he is wearing a wingsuit commonly known as the "flying squirrel suit". The wingsuit should have been made of special nylon materials, which is naturally impossible to find in today's world, but the wingsuit on Yu Tianlai's body is woven with black silk produced in Miaojiang, and the quality will only be surpassed.

Seeing that everything was ready, Yu Tianlai said goodbye to Tianbao, Zhang Junbao and Xuzhenxi without any delay, and then jumped into the hanging basket under the hot air balloon, and a strong energy popped out of his fingertips to cut the rope, and the hot air balloon that lost its grip rose when it landed.

The entire balloon was painted black, inconspicuous in the night, and even the flame that heated the air inside the airbag turned into a little spark after rising to a certain height, no different from the stars in the night sky.

Yu Tianlai had already observed the direction and strength of the wind, and after the hot air balloon was lifted off, it floated to the side where Kublai Khan's Golden Horde was located. He leaned over in the hanging basket and stared intently at the flickering Mongolian army camp, far more than ordinary people's eyes unfolded with all his might, searching the past inch by inch.

Suddenly, his gaze fell on a place in the hinterland of the Mongol army camp, where there was a magnificent and magnificent golden tent like a palace, and the inside of the tent was brightly lit, which was extremely eye-catching in the dark night. Around the Golden Horde, groups of Mongol soldiers armed with torches snag their way like fiery snakes, forming several lines of defense without gaps.

It is not difficult to find Kublai Khan's Golden Horde, it is rare how to determine whether he is in the Golden Horde at the moment. When Yu Tianlai saw a piece of blue and blue phosphorescence flashing on the top of the golden tent, a heart that had been hanging finally let go. This is the "dead room" sent to Kublai Khan's side. When the appointed time came, the "dead room" marked Kublai Khan's location with this special phosphor powder that glowed in the night. This phosphorescent light was inconspicuous, and it was sprinkled on the top of the Golden Horde, because of the angle, unless someone climbed on top of the head of the Great Mongolian Emperor, it would not be discovered.

Yu Tianlai took a deep breath, stretched out his hand to feel the wind direction and force again at the moment, and then jumped out of the hanging basket, opened his arms and legs at the same time, stretched the wingsuit on his body to the limit, and swooped towards the location of the golden tent.

At an astonishing high speed of 200 kilometers per hour, Yu Tianlai perfectly controlled the ubiquitous wind in the air with the wingsuit on his body, and accurately controlled the direction of his dive.

The moment he flew over the Golden Horde, he pulled the two strings on his chest with his hand, and a parachute dyed black popped out in a square package behind him, causing his extremely fast dive body to stun to the ground, and then slowly float down.

"What's that?" Kublai Khan's Golden Tent was so heavily guarded that even if Yu Tianlai invaded in such an unbelievable way, it was still discovered by the Mongol soldiers on patrol, and they all exclaimed and asked.

But at this moment, Yu Tianlai had landed more than ten feet above the Golden Tent, and he cut all the parachute ropes with his backhand, and his body fell like a meteor, and the roof of the Golden Tent had been torn and fell into it before the patrolling soldiers could react.

In the vast Golden Horde, Kublai Khan was discussing the current war with many civil and military officials, when he suddenly saw a strangely dressed figure descending from the sky, and everyone was shocked.

Yu Tianlai didn't give the other party a chance to react, the "Hui Sword" was unsheathed, the sword turned into a long rainbow body like a swimming dragon, and wherever the sword light went, a human head of Kublai Khan rose to the sky.

Without doing anything, Yu Tianlai's sword light hovered in the big tent, and in just a few breaths, the Mongolian civil and military generals who were full of the tent were slaughtered.

"Arrest the assassin!" Amid an earth-shattering shout, countless centaurs rushed towards the Golden Horde with boundless fury.

Yu Tianlai calmly put the sword back into the sheath and inserted this divine weapon that had been with him for several years in front of him. Then he closed his eyes slightly, letting go of the cultivation that he had been deliberately suppressing not to touch the door to a higher realm.

A dazzling cloud of incandescent light burst through the barrier of the Golden Horde in all directions, and then another pillar of incandescent light the thickness of a bowl shot straight into the air from the center of the bright light.

The Mongol soldiers who rushed to the front stopped in unison, staring at the incredible scene in front of them in amazement.

This miraculous spectacle lasted for more than ten breaths, and then it converged and disappeared as it had appeared.

The soldiers of the Mongolian army stood frozen in place for a long time, and finally someone cautiously entered the Golden Tent to investigate the truth, but only saw the corpses of Mongolian monarchs and ministers everywhere and a tin staff inserted in the middle of the big tent.

(End of Volume IV)