Because in order to let Emperor Yongzheng know that he was grateful, he swallowed a piece of soil from the cemetery that Emperor Yongzheng gave him. Prince Yi Yunxiang was actually very valued by Emperor Yongzheng at that time, but Prince Yi Yunxiang also knew that accompanying the emperor is like accompanying a tiger, so he was always cautious, fearing that he would not consider the etiquette of the emperor and his ministers, which would lead to death.
During the period of Emperor Kangxi, the position of the crown prince triggered the incident of "nine sons seizing the legitimate sons". At that time, the thirteenth elder brother Yunxiang was on the side of the fourth elder brother Yinzhen. Later, the fourth elder brother Yinzhen succeeded in ascending the throne as Emperor Yongzheng, and was particularly kind to his thirteenth brother Yunxiang, who always supported him. Therefore, Yunxiang became one of the few brothers who received favor from Emperor Yongzheng. After Emperor Yongzheng ascended the throne, he had to quickly choose a good piece of land for himself to build the imperial mausoleum, so he sent his most trusted Prince Yi Yunxiang to handle this matter.
After Prince Yi Yunxiang received the order from Emperor Yongzheng, he did not dare to slack off at all and went directly to consult an expert. After many comparisons by Prince Yi Yunxiang, the address of Emperor Yongzheng's imperial mausoleum was finally selected. The land was said to be a land with beautiful scenery and aura. Emperor Yongzheng was very happy when he found out. In order to reward his younger brother, he allocated a good piece of land on his mausoleum to be used as a mausoleum for Yunxiang. However, Yunxiang refused in every possible way. The reason why Yunxiang declined was because the land rewarded by Emperor Yongzheng was too good. Yunxiang thought that he was not worthy of enjoying it due to his status, so he was always unwilling to accept the reward from Emperor Yongzheng.
Later, in order to avoid the reward from Emperor Yongzheng, Yunxiang chose a not-so-good piece of land next to Emperor Yongzheng’s mausoleum and actively requested to use this land as his mausoleum in the future. Yunxiang's move was actually to let Emperor Yongzheng know that he always placed his ministers in his heart. Emperor Yongzheng also agreed to Yunxiang's request after learning about it. Later, in order to express his respect and gratitude to Emperor Yongzheng, Yunxiang took some soil from the cemetery and ate it.