This is obviously folklore, let's first talk about the situation after Zhuge Liang's death in history. Zhuge Liang's last will said that the Shu Han generals should bury him in the Dingjun Mountain in Hanzhong, with Dingjun Mountain as his grave, and as long as his grave can fit his coffin, and do not put other funerary items, he can wear a set of clothes.
It can be seen from this that Zhuge Liang wanted to make his tomb as simple as possible, because Zhuge Liang was a simple person who did not pursue luxury in his life, just like he said in the "Book of Commandments" to his son Zhuge Zhan, "Quiet to cultivate oneself, frugality to cultivate morality."
Later, after Zhong Hui entered Hanzhong, he specially came to worship Zhuge Liang Temple, and let the soldiers not graze or chop wood around Zhuge Liang's cemetery, which shows Zhuge Liang's cemetery, people at that time knew, and they also had great respect for Zhuge Liang, I think, if Sima Yi came to Hanzhong, it is estimated that he would also come to pay homage to Zhuge Liang.
After all, Sima Yi praised Zhuge Liang as a wizard in the world, and Sima Yan also gave Zhuge Liang an evaluation, and Sima Yan said: If Zhuge Liang came to assist him, he would be much easier.
This statement of the subject is obviously folklore, so what is the specific? Zhuge Liang looked at the heavens at night, he knew that he would soon die, he wrote a letter to Liu Chan, after his death, he hoped that Liu Chan would not bury him thickly, as long as he picked four soldiers to carry his coffin all the way south.
After the rope carrying the coffin is broken, that is where Zhuge Liang is buried, do not erect a monument, do not engrave words, can not make marks, dig a pit the size of a coffin, and then put the coffin in, then step flat, and then immediately go back, so that no one knows where Zhuge Liang's grave is.
So why did Zhuge Liang do this? Zhuge Liang knows astronomy, geography, and Qimen Dunjia is omnipotent, he believes in the Mandate of Heaven, and he feels that this way, where the rope is broken and the coffin is dropped, is his destination.
In addition, Zhuge Liang may think that there is nothing in his tomb, and no one knows where it is, then no one wants to get any benefits from his cemetery, after all, there are always some people who think that Zhuge Liang's tomb must be buried with a lot of good things, so that Zhuge Liang can't rest in peace when he dies, which is more similar to Cao Cao's seventy-two tombs.