Grave robbers usually choose places with good terrain, because they have good geographical advantages, good mountains and good water sources, and these places are easy to remember. Because the king at that time paid attention to geomantic treasures, only places with good geomantic treasures could bury the bodies and preserve them for a long time.
In the Han dynasty, people paid special attention to funerary objects. They usually bury their king very carefully because they are afraid of life and death. They want to continue to enjoy their former splendor after death, so they may hide all their gold, silver and jewels in the grave. There are not only gold and silver jewelry, but also some names and paintings. This is easy to be remembered by grave robbers, because if they can rob the tomb successfully, they will enjoy endless prosperity.
Moreover, during the Eastern Han Dynasty, Cao Cao established an official position at that time. The name of this office is a captain who touches gold. Although the name sounds elegant, they are actually grave robbers. The reason for this is that they need the treasures of the Western Han Dynasty to subsidize military expenses, which encourages their grave robbery. There are naturally few gold and silver jewelry in the tombs of emperors in the Han Dynasty, because all of them have been stolen by our own people.
Most importantly, the tombs of the Han dynasty were not hidden and buried at that time, and they were all clearly marked. Such a rich property is there, and others have to remember him. Moreover, some tombs in the Han dynasty were built in ancestral halls, which provided more obvious signs for them to rob tombs. Ordinary people certainly dare not, and some thieves certainly don't care about these things.
This is how the Han tombs were stolen, which has been thousands of years since the Han Dynasty. If no one steals the Han tomb, it is not normal.