Judging from the historical records, the BOC was forced to say that it was a "traitor" to do so.
Speaking of the BOC saying that this "traitor", in fact, the story is like this:
At the beginning of the Western Han Dynasty, the relationship between the Central Plains and the steppes was not good, but the Han Dynasty was more or less jealous of the Xiongnu, and after the Siege of Baideng, the inferiority of the Han Dynasty in the confrontation was completely exposed, and Liu Bang helplessly opened the road of "peace and affinity".
Before his death, Liu Bang explained that the later emperors had to accumulate thick and thin hair, to endure the shame brought about by peace with the Xiongnu, and when the time came, they would fight against the Xiongnu, so during the han huidi period and the lü period, this policy of "living in harmony" remained unchanged, and in the period of Emperor Wen of Han, the peace and relatives continued.
The Xiongnu appeared a figure who had a groundbreaking influence on the history of the Xiongnu, that is, Mao Dun Shan Yu, after the death of Mo Dun Shan Yu, his son Ji Congee inherited the throne of Shan Yu, known in history as "Old Shang Shan Yu".
In order to stabilize the grassland Xindan Yu will not attack the Han on a whim, Emperor Wen of Han took the lead in proposing the meaning of peace, to arrange for a royal woman to go to the Xiongnu to marry the Xiongnu as "Yan Zhi", which is also the meaning of the Xiongnu "wife", which is equivalent to Emperor Wen of Han sending a woman to the Xiongnu as an "empress".
In the face of the beautiful as a flower, gentle as water like the noble women of the Central Plains, the old Shangdan Yu is naturally happy to no, this kind of good thing can not be found to hit the lamp, naturally will not refuse, knowing that the old Shangdan yu promised, Emperor Wen of Han began to arrange people to prepare for the north.
In the Han Dynasty, the envoys who were close to the princess generally used "eunuchs", which is why the "Bocq said" was chosen, but this BOC said that he did not know for what reason, he was very resistant to going to the grassland, and he also released a threat, if he really forced him to go north, he would rebel.
The origin of the BoC is not bad, in the Qin and Han communication, the ancestors are not noble, look at the surname can be seen, the surname of the BOC is once the Spring and Autumn overlord Jin Guo one of the "six qing", the prestige is not good.
And the BOC said why he became a eunuch, no one knows the reason behind it.
The original BOC said that it was very resistant to the Xiongnu, but where would the ruler care about his opinion, they had the right to say that the Xiongnu were temperbroken, and the Xiongnu who went north were nine deaths, maybe these Huns left the princess, but killed the envoys, in this case, as long as the BOC said the more fiercely he scolded, the more he had to go.
In this way, the BoC said that he became a joint envoy, and also became a "gift", forced to go to the grassland, when leaving the territory of the Han, the BOC said that he swore that he must do what he said and betray the Han.
After arriving in the Han Dynasty, the Bank of China said that it began to change its appearance, and he did everything he could to please the newly ascended Shan Yu and the old Shan Yu, saying that he did not return to the Han Dynasty, so he stayed in the Xiongnu as Shan Yu's "adviser".
And the BOC said that he is indeed a talent, he understands a lot of the logic of the Politics of the Central Plains, according to his insight, he must be a close vassal of Emperor Wen of Han, can get the help of such a person as the BOC, the old Shangdan Yu naturally does not refuse, very happy, he agreed to the BOC said to stay in the Xiongnu.
After arriving at the Xiongnu, the Bocchio said that not only was it not underestimated, but it was respected by the Huns because of its extensive knowledge.
Soon after, the old Shangdan Yu died, and his son "Military Minister Shan Yu" ascended to the throne of Shan Yu, officially reusing this eunuch from the Han Dynasty, and the courtesy was very good.
Sometimes, the envoys of the Han Dynasty went north, and the reception was also caused by the Bank of China, who had friction and disputes with the Han Dynasty, and it was the Bank of China who came forward to explain the reasoning, anyway, the Bank of China said that it represented an important bridge of communication between Han and Hungary, and the Bank of China said that in every confrontation with the Han Dynasty, it was to help the Xiongnu.
He really did what he said, and became a "traitor."
Unlike everyone who advocates the "Sinicization" of the steppe people, the Bank of China said that as a Han, it took the lead in proposing to let Shan Yu prevent the grassland people from being highly Sinicized, but instead to preserve the style of the Xiongnu steppe people in large quantities, "go to Han Cun Hu", reduce the use of the cloth of the Han Dynasty, and reduce the consumption of food.
The BoC said that the people of the steppe should wear more leather clothes and eat more animal dairy products in order to get rid of the "Sinicization" caused by the Han dynasty to the Xiongnu in terms of productivity.
If you look at it from another perspective, you may also think that the BOC theory is not "in cao ying's heart in the Han", deliberately suppressing the Xiongnu who want to sinicize, so that they have been in a backward position, and then defeated by the Army of the Han, but the BOC said that it was in the Xiongnu that the Xiongnu taught the Xiongnu people to use the methods of the Central Plains to produce and activities.
The Bona fide said that the Huns taught the Huns to use a simple counting method to calculate the number of livestock and numbers, and the Huns made great progress for a while, so Shan Yu and the Huns attached great importance to the BOC theory, and also knew that the BOC said that it was a Central Plains person who hated the Han dynasty more than the Huns.
In the letter given to Shan Yu by Emperor Wen of Han, the Bonaco said that it had made changes without authorization, distorted the meaning therein, and placed Shan Yu in a humble position, aiming to deliberately create contradictions between the Han and Hungarian rulers, which could be said to be very "damaged", and the BOC said that it wished that the Han would be deposed by the Xiongnu.
Probably because of the different treatment received in the two places, the BOC said that he was completely fascinated by the feeling of being a "traitor", he had no descendants, and he was even more unscrupulous, and after the envoys of the Han Dynasty came to the Xiongnu, the envoys of the Han Dynasty pointed out that the morality of the Xiongnu was incomplete, and there was such a system as "accepting and marrying".
The Bocchia said that it directly attacked the shortcomings of the Han people, saying that the Han people are inconsistent in appearance, seemingly disciplined and law-abiding, and will be in accordance with etiquette and morality, in fact, they are grandiose, and the superficial set is a set behind the scenes, which makes the envoys of the Han Dynasty very depressed, because no one can imagine that this is a Han person who speaks out to slander his own nation.
With the background of the Xiongnu, the BOC began to "threaten" the envoys of the Han Dynasty.
He did not like to argue again, and during the period of Emperor Wen of Han, the court still implemented a policy of "appeasement", sending a little material to the Xiongnu every year, such as clothing and grain, in order to let the Xiongnu army not cross the border to ruin the rice fields in the Central Plains.
The Bank of China said that with this problem to talk about things, he threatened the envoys of the Great Han, if the grain and clothing sent by the Great Han were not good, then the Xiongnu cavalry would have to cross the border to plunder the grain and wealth of the people of the Central Plains, which frightened the envoys of the Han dynasty into silence, and the Xiongnu themselves were confused, why was this Han so cruel.
If from the perspective of surname, the Zhonghang clan is still a descendant of the Zhou Dynasty royal family, to know that the Central Plains and the grasslands have been hostile since ancient times, Pifu has the responsibility to fight against the Xiongnu, but the Bank of China said that it was "surrendering" to the Xiongnu, and I don't know how much grievance the Han gave him, or he could not go to the Xiongnu, and was touched by some indescribable secret.
Regarding this "traitor", history has no good ending for him, and what happened to him later, because the Huns have no habit of recording history at all, so it is blurred, but it is basically certain that by betraying his compatriots, the BOC said that the Xiongnu were not bad.
This is the superb means of the Xiongnu to win the hearts and minds of the people, and the establishment of this one surrendered to the Bank of China, in order to "rebel" more of the Bank of China, there are not a few people who are not ambitious in the court, and a eunuch is treated with such courtesy, if other civilian and military generals are not to be honored as guests.
But the Great Han is also a dynasty with a temper and backbone, and it is a very helpless move to be forced to make peace, not to betray his compatriots for the sake of glory and wealth, and the whole Big Han, in stark contrast to the Bocchia, is Su Wu, who was later captured by the steppe people to herd sheep in the "North Sea" (Lake Berga).
Su Wu is tenacious and indomitable, while the Bank of China says that it is the initiative to surrender to the enemy, and the gap is very large.
That is to say, the BoC said that he was a eunuch and could not be entrusted with too much heavy responsibility, otherwise, the BOC said that whether he was a military general or a civilian official, as long as he came into contact with the Han people, presumably nine out of ten people wanted to crush him to ashes.
This "traitor", not only in the Han Dynasty, but also in the entire history of China, has a very bad reputation, and some people sympathize with the BOC and think that he is also a helpless figure persecuted by the rulers, but the BOC says that he should not threaten the border people with Xiongnu cavalry, and when he hurts innocent compatriots, he can no longer turn back.