This problem is indeed recorded in ancient books, and it is recorded in the Collection of Strong Books written by Chu people in the Qing Dynasty. There is a short story of Senecio in Volume Four of Six, which can be used to answer this question.
According to legend, Zhu Yuanzhang began to build Xiaoling Mausoleum on the sunny side of Zhongshan Mountain, that is, Zijinshan Mountain, in the 14th year of Hongwu, as his and Ma Huanghou's final resting place. Purple Mountain is a treasure trove of geomantic omen, with beautiful scenery and lush scenery. There are many deer in the mountains. In order to prevent hunters from killing these deer and destroying the ecosystem in the mountains, and to prevent people from going up the mountain easily, Zhu Yuanzhang specially set up a guard for Xiaoling at the foot of the mountain, namely Xiaolingwei. Zhu Yuanzhang left thousands or even tens of thousands of elite guards for Xiaoling, guarding Xiaoling after death. The selection and assessment of these guards are extremely strict, with the aim of selecting another elite soldier among the elite soldiers. Before Zhu Yuanzhang's death, in fact, Xiaoling had always had a guard. After all, Ma Huanghou was buried in Hongwu for fifteen years, and then Xiaoling continued to start construction.
Zhu Yuanzhang not only set up the Xiaoling Mausoleum, but also set up thousands of horse-herding rooms, specially setting aside places for raising horses and giving deer in the mountains a warm home, hoping that they would thrive in the mountains. However, after the establishment of these 1,000 households, they encountered difficulties, that is, the post of standard guard has been vacant and there is no suitable candidate to manage these 1,000 households. However, Zhu Yuanzhang did not worry, but took his time to find it.
On one occasion, Zhu Yuanzhang paid a private visit to Xiaoling with several guards traveling incognito. When he went, the weather was not bad. I didn't expect to be caught in heavy rain when I came back. Zhu Yuanzhang and his guards went to a farmhouse to take shelter from the rain. The host warmly received Zhu Yuanzhang and others and prepared clean towels, clothes and hot water for them. The rain never stopped. Later, the host asked his wife to prepare some simple meals for several people.
During lunch break, Zhu Yuanzhang asked the host what his name was, and the host said his name was? Winter hair? Zhu Yuanzhang asked which word it was. After the master finished speaking, Zhu Yuanzhang was very happy, as if a question that had been bothering him for a long time suddenly had an answer. In fact, Zhu Yuanzhang really thinks that this Dong Mao is the person he is looking for. Because? Winter hair? The name means that the grass is lush. Isn't that what horses and deer need
Zhu Yuanzhang asked Dong Mao about it again, only to know that Dong Mao did have some experience in raising horses, so Zhu Yuanzhang asked Dong Mao to do thousands of households, manage them full-time and feed them carefully. Let this. Pasturing thousands of households? The position is hereditary, and Dong Mao's descendants have been herding horses for generations, which is a family business. Since then, Dong Maoan has been running a ranch. When his house and courtyard wall need to be renovated, the government will take the initiative to repair them, thus exempting Dong Mao from worries.
A rain solved Zhu Yuanzhang's difficulties and brought Dong Mao an opportunity, which can be described as a good relationship.