Why were most villages in Shandong established in the Ming Dynasty?

At the end of Yuan Dynasty, Shandong was hit hard, with ten rooms and nine empty rooms.

Even hundreds of miles are barren.

After the establishment of the Ming Dynasty, Emperor Hongwu immigrated to Shandong from Shanxi, where the disaster was slight.

So many villages in Shandong were founded by Shanxi immigrants at that time.