First of all, the relationship between colleagues is not good
In the Song Dynasty, the "civil servant system" was implemented, so in the imperial court, China officials were all redundant military commanders, and the prime minister and other ministers could only be civil servants. Even if the military commanders were in a low position, their rights were very small. Di Qing only sat in the position of "the envoy of the Tang Dynasty" all his life. However, he has repeatedly made meritorious military service, and the speed of his promotion has aroused the dissatisfaction of civil servants.
In addition, he can't handle his colleagues' relationship well, and he doesn't have a good relationship with North Korean civil servants, which leads those people to find fault with him by all means, framing Di Qing and speaking ill of Di Qing in Song Renzong for many times. No matter how popular Di Qing is, if these people talk too much, they will plant a seed of doubt in Song Renzong's heart.
Second, rumors aroused the emperor's suspicion and he didn't know how to restrain himself.
In the Song Dynasty, it was required to report to the relevant departments before burning paper at home, and no fire could be made after midnight. However, Di Qing once failed to report the burning of paper, which led to the light of burning paper in the middle of the night being seen. Those civil servants took advantage of this incident, spreading rumors that Di Qing's family had turned red, and smeared him crazily in front of Song Renzong, which aroused Song Renzong's suspicion.
Usually in the barracks, too, it is good to bless the soldiers after winning the battle, but she directly told people that "this is a gift from your grandfather Di Qing" and let others know that the soldiers called him "Grandpa Di's" when asked. Under the guidance of a willing heart, this sentence reached the ears of Song Renzong who was dissatisfied with Di Qing's practice.
Third, the fame is too great and the works are high.
Di Qing has won many battles since he became an official, which is why he will be favored by Song Renzong. However, we all know the truth that "extremes meet, and glory will decline". At first, Song Renzong really liked Di Qing, but as he won more and more battles and gained more and more popularity in the military camp, Song Renzong began to fear him.
The emperor's most taboo is "work high to cover the Lord." It happened that Di Qing was too sincere. After every victory, Song Renzong rewarded him with everything, and he knew nothing about it. This made Song Renzong later start to fear him, trying to regain his rights, not to let Di Qing threaten his position, but also to leave hidden dangers for his descendants.
So Di Qing died a terrible death. After all, the emperor was suspicious, which is why most ancient generals did not end well. So, although Di Qingxian was very popular with Song Renzong at first, he did not know how to converge after many meritorious deeds, and the gossip about him from outside also made Song Renzong have some doubts about him.