After the fall of Xiangyang City, the only foreign aid in Luoyang City was cut off.

Wang Shichong was stunned, he deeply felt that he had fallen into the heavy encirclement of the Tang army, and if he could not find new reinforcements, he would definitely die without a place to bury.

Outside the city of Luoyang, more than 100,000 troops of the Tang Dynasty have surrounded the city to the point that even the birds are difficult to overcome.

Wang Shichong stood at the head of Luoyang City, sighing uncontrollably, he knew that there was no hope of breaking through, so he personally ordered the crown prince Wang Xuanying to be the fourth batch of special envoys for help, and went to Dou Jiande in Zhaozhou to ask for help.

Wang Xuanying and his entourage disguised themselves as ordinary people, chose a dark and windy night, went out of the city from the secret passage of the underground palace in Luoyang City, and secretly marched eastward.

A few days later, when they were sure that they had come to Dou Jiande's jurisdiction, they bought horses in the horse market and went straight to Zhaozhou.

Dou Jiande learned that the crown prince of Zheng Guo had come in person, so he personally met him in the palace.

Wang Xuanying exposed his back, only to see that Zheng Guo's territory map was all printed on his back.

Wang Xuanying promised that if Dou Jiande sent troops, he was willing to give half of Zheng's country.

In order to show his sincerity, Wang Xuanying also brought Wang Shichong's handwritten letter - "King Xingmandun Shouxia, weep and say goodbye!" Now the north is standing on three legs, and Tang is eager to swallow Zheng, this is a time of critical survival. Wangxia Wang gave up his past suspicions and faced up to the crisis. If Zheng is not guaranteed, Xia will follow, this is the reason for the cold lips and teeth. For the Xia King, for Hebei, hope that the first soldiers will aid Luo. The eastern part of Zheng Zhi can be ceded by coefficients. The Tang army besieged the city very urgently, and once the city was broken, it was too late to regret it. I hope that the king of Xia will send troops as soon as possible, and he will be full of weeping and three bows, and he will be afraid! ”

Dou Jiande has always had a bad relationship with Wang Shichong, and he looks down on Wang Shichong as a person. But at this moment, he saw that Wang Shichong was so sincere, and it was not easy to refuse, so he said solemnly: "The matter is serious, let me give you an answer after discussing with the important ministers." ”

Wang Xuanying knelt on his knees and said excitedly: "King Xia, your lips are cold and your teeth are cold!" I also hope that King Xia will think twice......"

Why didn't Dou Jiande understand the truth of cold lips and teeth. But he had already concluded an alliance with Li Yuan, and it was inconvenient to send troops.

But if he doesn't send troops, once Luoyang is defeated, his situation will be very dangerous. For the sake of prudence, he specially summoned his ministers to discuss the matter.

Wei Zheng, the resident of the house, suggested that he immediately raise troops and adopt the method of encircling Wei to save Zhao and attack Chang'an from the east of the river. In this way, the siege of Luoyang will be automatically lifted.

Zhang Xuansu, the squire of the Yellow Gate, advocated that Hebei should be governed first, implement benevolent government, and clean up the hearts of the people. It is really not cost-effective to spend tens of thousands of troops to rescue the unpopular Wang Shichong.

Another close minister, Liu Bin, suggested that the snipe and clam should at least wait until the strength of the two sides was almost consumed before sending troops, and he believed that the time had not come.

When Dou Jiande heard this, he laughed: "Our army should sit here and watch the tiger fight first!" ”

Dou Jiande then replied with a letter, claiming that he would definitely rescue Luoyang, and let Wang Shichong stick to Luoyang and wait for the arrival of soldiers and horses from Hebei.