There was a poem that said: "The north wind blows the white grass on the ground, and the sky is full of snow in August." This shows how long and cold the winter in the north is. Besides, it is still winter months, which is basically the coldest time in the north. So as soon as they left Juyongguan, it was snowing all over the sky every day, and the marching speed of the army became very slow. After leaving Juyongguan, heading north is Yanqing Prefecture. This is still the territory of the Daxia Dynasty, but Yanqing Prefecture is connected to the Tatar territory and has always been harassed by the Tatars. Therefore, no one can guarantee whether there will be Tatars here. Jiang Xia¡¯s 200,000-strong army marched directly into Yanqing Prefecture. The journey on the first day of junior high school went quite smoothly. Basically, people came out to greet us in the cities we passed along the way, and we were also able to carry out a round of supplies. But when the army entered Yunzhou, it seemed a little abnormal. Although Ruyunzhou has the word "zhou" in its name, it is actually a military pass. Behind it are Zhougou Fort and Heihanling Fort. If you want to exit Yanqing Prefecture and enter Tatar territory, this is the first place you must pass when entering Yunzhou. If you don¡¯t pass here, you have to take a detour through Yunchuan. Not to mention the distance, the key point is to enter the Tatar territory and have to face the Tang River. If the Tatar army stood guard on the banks of the Tang River and sniped at Daxia soldiers and horses, then forcibly crossing the Tang River would probably bring considerable losses to Jiangxia. Therefore, Jiangxia¡¯s troops must pass through entering Yunzhou, and then exit the customs through Heihanling Fort. In order to ensure that nothing went wrong, Jiang Xia sent someone early to send a handwritten message to Hu Wei, the general guarding the city who entered Yunzhou, asking him to take his generals to Baduanlipu to meet him. Not long after the imperial edict was sent to Ruyun Prefecture, Hu Wei sent someone to deliver a letter back, saying that he would definitely wait for the Holy Spirit at Baguanlipu. But now that the Jiangxia people have arrived not far from Baduanlipu, Tanma came to report that there was no one in Baduanlipu. The generals who entered Yunzhou were not seen, and there was no one in Baguanlipu. Such an abnormal situation naturally proves that something happened in Baduanlipu and Ruyunzhou. After Jiang Xia thought about it, he decided to send a vanguard force of 5,000 people to Yunzhou to check and figure out the specific situation before making a decision. This vanguard force was led by a student from the Jiangwu Hall, and all rode forward on war horses so that they could retreat easily in case of an accident. But after five days of leaving, there was no news from the vanguard. It should only take three days to go from Baduanlipu to Ruyunzhou. Now that there is no news for five days, something must have happened. The Jiangxia people couldn't wait any longer at Baguanlipu, so they finally decided to lead their army straight into Yunzhou to see what was going on in Yunzhou. The location of Guancheng entering Ruyunzhou was chosen very cleverly. Before entering Ruyunzhou, it had Qingshui River on its left and Henggou Camp on its right. But the further you go into Yunzhou, you will see Daling Mountain on the left and Shibi Mountain on the right. The city of Guancheng entering Yunzhou is exactly located between the two mountains, directly connecting the two mountains. If you want to pass the level, there is no other way but to go out and attack this road. I don¡¯t know why the thin fog becomes thicker and thicker along the road as we walk towards Guancheng in Yunzhou. On the first day of the new year, Jiang Xia thought that the fog only formed here because of the cold weather. But when Jiang Xia estimated based on the march map that there was less than twenty miles left before entering Yunzhou, the fog along the way began to take on color. There seems to be a trace of scarlet mixed in among the seemingly non-existent tender green. The soldiers in the army were a little sluggish when they first entered Yunzhou, but now many soldiers have begun to vomit, convulse, and become comatose. Some soldiers with weak constitution died directly within an hour or two after falling into coma. How could Jiang Xia still not understand that the "fog" along the way was not an ordinary mist, but a poisonous mist containing highly toxic substances. As we all know, any poison will always lose its toxicity due to excessive dilution. For example, if you place the extremely poisonous Broken Heart Powder at a certain water source, it will poison a few people within an hour or two at most. After a few hours, the water will dilute the poison and the toxicity will disappear. And this poisonous mist has been maintained from the entrance to Yunzhou to now less than twenty miles away from Guancheng of Yunzhou, and its toxicity has changed from weak to strong. It is enough to prove that there is a poison master in Guancheng in Yunzhou. In this world, Jiang Xia only knows two people who are so powerful in poisoning, one is Yi Crab and the other is Gui Sanzhen. But it is impossible for these two people to help the Tatars deal with themselves, so Jiang Xia can only guess that the poison master who entered Yunzhou is from the Tatars. The poisonous mist is extremely powerful. If you stay here all the time, the soldiers will suffer heavy casualties. So Jiang Xia had no choice but to retreat, and the army withdrew outside Ruyun Prefecture. After setting up camp outside Yunzhou, Jiang Xia ordered people to check the casualties of the soldiers. Soon, QianThe bank sent us the statistics collected by the following people. Just when they entered and exited just now, more than 900 soldiers were poisoned by the poisonous mist, and the number of soldiers poisoned was even more, more than 3,000. Facing such data, Jiang Xia was also shocked. If he hadn't announced his retreat in time just now, could it be that the poisonous fog alone could have reduced his number by more than 10,000 people? In the camp of Jiangxia's general, all the generals from the middle army are here. The expressions on everyone's faces were a little solemn. The army in the middle was responsible for the main battle. The most ideal situation was to destroy everything all the way, directly to Wuliangha, and then join the other two armies. But now, the army has encountered such a big problem before it even leaves the border. It is really demoralizing. Zhang Meng, who was standing behind Jiang Xia, cursed: "Mother Xipi, do those barbarians know some magic? The fog breaking is too evil." "Don't talk nonsense!" Hai Dayou quickly stopped Zhang Meng, he knew very well , if such rumors of ghosts and gods reach the ears of soldiers, they will definitely become more and more serious. In the end, the morale of the soldiers will plummet, causing irreparable consequences. Zhang Meng has always been afraid of Hai Dayou. After all, Hai Dayou's skills are unfathomable and are too much higher than him. When Hai Da said this, Zhang Meng quickly covered his mouth with his hand and stopped talking. Jiang Xia looked back at Zhang Meng, and then said: "Yes, that is definitely not a sorcery, but a poisonous mist arranged by a poison master. Don't worry, I immediately sent someone to notify the King of Herbal Medicine using a flying pigeon. "Senior Yi, let him come here to help me." "Your Majesty is wise," all the generals said in unison. The letter from Fei Ge reached the capital overnight. Yi Crab, who is now in charge of the entire Imperial Hospital, did not delay at all after receiving Jiang Xia's letter from Fei Ge, and immediately left for Ruyunzhou.