Why are there so many tombs of the twelve emperors of the Qing Dynasty in Hebei?

The mausoleum should be close to the capital, which is convenient for ancestor worship. This is only one aspect, as long as it is still a matter of geomantic omen. Although China is so big, there are not many natural places suitable for imperial tombs. How many emperors were there in China before the Qing Dynasty? The use of geomantic treasures is similar. There is another main reason. The Qing Dynasty entered the customs from Shengjing (Shenyang), and Hebei was very close to their hometown. There is also the son of heaven, and the late old emperor will also help the son of heaven in the underworld. It's called ancestral protection. Hebei is the only place to choose.