Therefore, after Yan 13 participated in the funeral of Yuwen Prajna as a special envoy of Goguryeo, he officially submitted a letter of state to Dulan Khan Yongyu Lu, asking the Turks to fulfill their promise and send troops from Wuyuan City to the south, capture Baidao Prefecture, and enter Yanmen Pass, while Goguryeo sent troops from Liaodong at the same time, captured Yingzhou, and directly took Linyu Pass.

As he expected, Yongyu Lu read the letter of resignation and categorically refused to join forces with Goguryeo to attack the Sui, and specially invited Sun Sheng, the envoy of the Sui Dynasty, to reiterate in front of the Changsun Sheng that the Turks had no intention of making enemies with the Great Sui and were willing to continue to reconcile with the Great Sui.

"As far as the foreign ministers know, unlike the empress of the Sui Dynasty, Ke Hedun has the right to participate in military affairs, and it is precisely on this basis that our king agreed with the Jiang Shangyuan special service of your state to assign the foreign ministers to come here to discuss with the Great Khan the matter of raising troops to attack the Sui." Yan Shisan, ignoring the presence of Changsun Sheng, argued with Yongyu Lu, "Now that the Great Khan has rejected the request made by your state on the grounds that Ke Hedun sent an envoy to his state without your permission, isn't he afraid that this matter will be spread out and people will be laughed at, condemn the Turks for rebelling, and fear the Sui Dynasty?" ”

Yan Shisanyan was only sixteen or seventeen years old, but he dared to accuse himself of treachery in public, Yong Yulu's face fell at that time, but he looked at Changsun Sheng, hoping that he would come forward to teach this arrogant and rude boy a lesson.

Changsun Sheng understood that this was Yongyu Lu taking the opportunity to show favor to himself, and at the same time, he also wanted to raise his identity, hoping to refute Yan Shisan through his own mouth, so that the Turks could take the initiative between the Sui Dynasty and Goguryeo, highlighting the importance of their strategic position, so he nodded slightly at Yongyu Lu, stepped forward and hugged his fist at Yan Shisan, and said: "If I remember correctly, your envoy returned to Goguryeo from Chang'an with me a few months ago, right?" Unexpectedly, less than 100 days after returning to China, he was entrusted with a heavy task and sent an envoy to the Turks. ”

When Yongyu Lu ordered someone to invite Changsun Sheng to come, Yan 13 made up his mind that today he must frustrate the prestige of the envoys of the Sui Dynasty in front of the Turkic Great Khan, so as to persuade the Turks to fulfill their promise and promise to raise troops to attack Sui, so he unceremoniously replied to Changsun Sheng and said: "I am different from your envoy, your envoy is here to instigate the Turkic infighting and kill people, and I am here to form an alliance with the Great Khan and give benefits to the Turks." Now that the purpose of your envoy has been achieved, I advise your envoy to hurry back to the court to ask for a reward, lest he leave too late, and when the Great Khan comes to his senses, he will not be able to leave. ”

As soon as he opened his mouth, he revealed the truth that Changsun Sheng deliberately instigated Yongyu Lu to kill Yuwen Panruo, which aroused Changsun Sheng's anger, and raised his voice and said: "Your envoy accuses me of instigating Turkic infighting, please show evidence." If you don't have a certificate, but with your red mouth and white teeth, you will be expelled from Dujin Mountain by the Great Khan! Moreover, if it weren't for the Great Khan inviting me to come today, I wouldn't know that Goguryeo paid tribute to my Great Sui on the surface, but planned to raise troops and cause chaos behind my back, I must report this matter to the Holy One, I'm afraid that Gao Yuan won't dare to admit it at that time, right? ”

"You!" Yan Shisan was far inferior to Changsun Sheng in terms of experience in both the city and the envoy, and after a few words, he was not angry with Changsun Sheng, but he was so angry that he couldn't speak, and forced the anger in his heart, and turned to Changsun Sheng to provoke, "Although I am young, I have long admired the Great Sui Dynasty There is a general of Changsun Sheng, who is very good at archery, and once shot through two eagles, and is not talented in Xia, today I am willing to ask General Changsun for advice in front of the Great Khan, I don't know if General Changsun is willing?" He believed that he was the first archer of Goguryeo, and he couldn't get a little cheap from Changsun Sheng, so he wanted to take the opportunity of testing archery with Changsun Sheng to regain his disadvantage, and at the same time let the Turks see the strength of Goguryeo and enhance their confidence in raising troops to attack Sui.

Yan Shisan coldly proposed to test the archery technique with Changsun Sheng, which was the intention of Dulan Khan Yongyu Lu.

It turned out that Yongyu Lu was born with divine power, and he was also very good at archery, with a wolf bow in his hand, and he was known as the first Turkic marksman when he was a prince. Over the years, he has dealt with Changsun Sheng many times, and has always wanted to find an opportunity to compete with him in archery, and now he saw that Goguryeo, a young envoy, wanted to test his archery with Changsun Sheng, so he immediately nodded and said: "Yes, Ben Khan has heard his father Khan praise General Changsun for his unparalleled archery skills more than once, but he has never had the opportunity to see the general's magic marksmanship face to face. Today's weather is clear and the wind is clear, why don't we strike the country for the time being, shoot a few arrows at the school field together, and move our muscles and bones, how about it? ”

Knowing that Yan Shisan proposed to test the archery method with himself, Changsun Sheng was scratching Yongyulu's itch, so he said lightly: "The foreign minister has heard that the Great Khan is the first archer of the Turks, and if he can witness the Great Khan's marksman with his own eyes today, it will be a blessing." The ministers were willing to accompany them. ”

"Come on, prepare everything on the school field, Ben Khan is going to meet with General Changsun in archery today!" Yongyu Lu didn't pay attention to Yan Shisan, and only said to Changsun Sheng.

Yan Shisan couldn't help but be annoyed when he saw Yong Yu Lu looking down on himself so much, so he stepped forward and reminded Yong Yu Lu with his fists: "Great Khan, after a while, it will be better for the foreign minister to accompany General Sun to practice a few arrows, and heat up the field for the Great Khan." ”

Yong Yulu suddenly remembered that it was indeed Yan Shisan who first proposed to test archery with Changsun Sheng, and couldn't help but stare at Yan Shisan with suspicion and asked, "Look at your young age, how many years have you practiced arrows?" ”

Yan Shisan smiled conceitedly and replied: "Although I am far inferior to General Changsun in the next years of archery training, if you talk about the head, it can also be said that there are no arrows, and so far, no one has been able to escape under my arrows." ”

Hearing this young man's tone so big, Yong Yulu's mind changed, and he smiled at Changsun Sheng: "The so-called newborn calf is not afraid of tigers, and since Yan Shisan was so warmly invited, the general asked him to open his eyes?" ”

Changsun Sheng stretched out his hand and said the word "please" to Yan Shisan, and took the lead in walking out of the big tent.

The school field of Dujin Mountain is only two arrows away from the Great Khan's tooth tent, and when everyone gathered around Yong Yulu, Changsun Sheng, and Yan Shisan to walk to the school field, they saw that the school field was ready to stop: on one side, more than a dozen pairs of bows and arrows with different strengths were placed, and on the other side, a row of arrow targets was set up a hundred steps away from everyone. And next to the bow frame, there stood a Turkic warrior standing majestically, holding a wolf bow and a wolf arrow in his arms.

Yan Shisan saw Yongyu Lu's wolf bow and wolf arrow at a glance, and he was interested, walked to the arrow slave in a few steps, approached and carefully looked at the bow and arrow in his arms, and turned to Yongyu Lu and asked, "Can this bow and arrow of the Great Khan be borrowed for the next use?" ”

Yongyu Lu was already surprised that Yan Shisankou was arrogant, daring to challenge Changsun Sheng, who was the best in the world in archery, at this time, seeing that he was going to borrow his beloved bow and arrow to compete with Changsun Sheng as soon as he arrived at the school, he couldn't help but persuade him: "If you want to make this pair of wolf bows and wolf arrows, you must have two or three hundred catties of strength in both arms, and the wolf arrows are a few feet longer than ordinary feather arrows, and it is even more difficult to control, you still go to the bow stand and choose a pair of suitable bows." ”