Why not protect the tomb of the king of Mingdezhuang?

The tomb of the king of Mingdezhuang is not protected because it has no value. After the rescue excavation of King Dezhuang's tomb by archaeologists, the empty tomb was not backfilled, but remained intact. All the valuables are protected, and the rest are worthless blue bricks and tomb walls, so they are not protected. Therefore, the tomb of the king of Mingdezhuang is not protected because it has no value.