This heavy rain began to fall from the direction of Tongguan, that is, from the east, and the rain belt moved from Tongguan to Chang'an, and the scope was very large, and it began to fall in Chang'an after it had been raining in Tongguan for a long time.

The reinforcements who were rapidly marching in the direction of Tongguan were also drenched in the rain on the road.

When the clouds were thick in the sky and there was a cool breeze, Dou Hua was still very happy. Today's afternoon was very hot and humid, and many sergeants fell to the ground from heat stroke during the run, and some horses could not bear it and died on the road during the run. Later, the sun disappeared, and the wind blew, and the people felt much more comfortable and cool, and the overjoyed Dou Hua immediately ordered the sergeant to speed up his march and take advantage of this rare cool time to walk more.

But then the wind arose, and it was very strong, and it was cooler, but it caused great trouble for their rapid march.

The wind was blowing from the southeast, and they were running against the wind, and they couldn't run fast at all, and they consumed a lot of physical strength, which made him feel miserable.

Then the wind was getting stronger and stronger, and some of the sergeants who were not physically strong were blown off their horses by the oncoming wind, so Dou Hua had no choice but to order the sergeants to take refuge in the nearby post house, and take the opportunity to replenish food and drinking water, as well as the forage for the horses, and prepare to move forward after the wind was less.

However, what made Dou Hua even more miserable happened immediately. When the wind calmed down, a downpour followed, and their movement was still hampered.

But Dou Hua no longer dared to stay in the post house, and when the wind was light and the rain had just begun to fall, he had already ordered the sergeant to mount his horse and march again, hurrying at the maximum speed he could.

When they embarked on the trip again, the rain was getting heavier and heavier, and the big one couldn't see the situation ahead clearly, and the heavy rain hit the people, it was cold and painful, but Dou Hua didn't dare to have any hesitation, and ordered his sergeants to continue to march against the wind and rain, and run as fast as they could. He had received orders from the emperor several times, and each time he had strictly ordered them to march hastely, and to arrive at Tongguan before dark, without delay.

Originally, it was expected that he would be able to arrive at Tongguan before dark, but this sudden thunderstorm disrupted his wishful thinking, and if the rain kept falling, he might not be able to reach Tongguan after nightfall. According to the sergeant's report through the post station, they were only more than 20 miles away from Tongguan City, but Dou Hua also knew that the remaining 20 miles was the most difficult, and no one knew how much time it would take.

Thunder and lightning flashed, pouring rain, the heavy rain hit the men and horses could not open their eyes, some horses were frightened, it was difficult to control, and even some ran to the fields outside the official road.

Zhang Jianbu, who was following Dou Hua, encountered a similar situation, but he and Dou Hua's strategy was different, he did not take advantage of the situation to rest when the wind rose, but ran against the wind for a while, and when the heavy rain just fell, he went to a village on the side of the road to rest, and ordered the sergeant to replenish drinking water, food and forage for the horses, and after the rain fell for a while, there was no sign of stopping, so that the sergeant got on his horse again and hurried against the wind and rain.

Zhang Gradual's thoughts are similar to Yang Guozhong's, he feels that this heavy rain is heaven's help to my Tang Dynasty, and the rebels will definitely not attack Tongguan City in such a stormy weather, even if the rebels have already attacked the city, they will be postponed because of the weather.

Although the heavy rain hindered their marching speed, it was relatively more beneficial to the defenders of Tongguan, at least it could temporarily disintegrate the offensive of the rebels, give the defenders of Tongguan a chance to breathe, and buy time for their men and horses to rescue.

These rescuers who are rapidly advancing eastward on the road must have enough time for them to consume, and when they arrive at Tongguan, the crisis in Tongguan must not have appeared. Because of this idea, although Zhang gradually ordered the sergeant to move forward in the rain, he did not repeatedly order the sergeant to move forward at full speed, and even ordered the sergeant to hide from the rain when the wind and rain increased, and this situation did not change until the emperor's emergency report was sent from the direction of Chang'an again.

But by that time, the rain had basically stopped, and the other troops had begun to speed up again, which of course was a later story.

The army led by Chen Xuanli, who was dozens of miles away from Zhang Yan's department, naturally also suffered heavy rain.

Chen Xuanli didn't have the urgent idea of Dou Hua and Zhang Yan asking for help, but he had his own small calculations, and wanted to arrive at Tongguan when the defenders of Tongguan and the rebels were both defeated and their strength was exhausted, and he would personally clean up the mess.

If this is the case, then Tongguan is saved, it is all his credit, no matter what Yang Xi and Ge Shuhan did in front, they have no credit, because they lost the battle and almost lost Tongguan. And he played the hero of the emergency, it was he who led the reinforcements to protect Tongguan and saved the fate of Datang, he is a big hero, and the others are bears.

Chen Xuanli originally had no direct conflict with Yang Guozhong, but the 200,000 troops in Tongguan were almost wiped out, and after the situation that Tongguan, the gateway to Chang'an, was in danger, the dissatisfaction with Yang Guozhong that he originally hid in his heart was very strongly expressed, and even dared to accuse Yang Guozhong in front of the palace and ask the emperor to convict. He knew that the rift between him and Yang Guozhong had formed, and it was impossible for him to be alone in the future, and he hoped that this battle of Tongguan would further weaken Yang Guozhong's influence, and even make the court blame him.

He knew that in order to do this, he must not let all the credit for the defense of Tongguan be recorded on Yang Xi, but should wear it on his own head, and wear most of the credit on his head, so that his influence in the court will rise sharply, and he will become a hero who saved the Tang Dynasty in danger, and even have the opportunity and strength to confront Yang Guozhong.

With such a thought, when he saw the sudden change in the weather, lightning and thunder, and strong winds, he immediately ordered the sergeant to find a place to shelter from the wind and rain.

The strong wind at the beginning really made it difficult for the sergeant who was walking against the wind, and the subsequent rainstorm confused his vision, and Chen Xuanli hid at the post station to avoid the wind and rain with peace of mind.

Of course, he also felt that the rebels would not brave the rain to attack the city in such extremely bad weather, and would definitely start attacking after the rain stopped.

He knew the previous battle situation, and he knew that Yang Xi had used some small tricks to successfully block the rebels in the night and morning before the Hantong Pass, and the rebels did not arrive at the Suitong Pass until after the afternoon. The rebels had to assemble before they could attack the Sui Tong Pass, and if they had been hesitant, they would probably not have attacked the city before the heavy rains came.

Chen Xuanli, who had such a conjecture, was of course not in a hurry at all, when he hid in the post station to avoid the rain, he also ordered the post guard to warm him some wine and get a few hot dishes to satisfy his hunger. It's a quick and slow rush all the way, but it's very painstaking and troublesome, and the physical exertion is very large, so you have to rest well and replenish your energy.

It was not until he received another order from the emperor to send him through the post house that he hurriedly ordered the sergeants to march forward in the rain.

Whether it is Dou Hua, Zhang Jian and Chen Xuanli, they don't know that the battle in Tongguan is fierce now, and both sides are fighting hard.