Second, when the reinforcements first entered the Central Plains, they really wanted to use some talents in the Central Plains to consolidate the political power. He values Wen Tianxiang's talent, so someone strongly recommends Wen Tianxiang. At that time, Wen Tianxiang replied that he could be a counselor of the Yuan Dynasty by marrying himself, but after someone deliberately framed him, Wen Tianxiang finally lost his life.
Third, if there were no other people's frame-up, Wen Tianxiang might have been imprisoned by Kublai Khan, and he wouldn't have lost his life so soon, because Kublai Khan felt very sorry after Wen Tianxiang's death. He agreed at that time, and then he backed out, but it was too late for him to back out. Wen Tianxiang has passed away, so Kublai Khan did this to Wen Tianxiang mainly for his country.
Fourth, if Wen Tianxiang is released, he may once again become a man against reinforcements. Because Wen Tianxiang is very popular in everyone's hearts and has the ability to unite everyone, Kublai Khan does not want to make himself aware that his grave will bring certain dangers to the country. Although he is rare, he can only choose his own country.
In fact, as can be seen from the conditions in Wen Tianxiang, Wen Tianxiang did not really intend to surrender to the Yuan Dynasty, and we also saw his character from him.