That was a long time ago about the old mage. You mean Yan 'an Road Elevated. In the past, when the project was just under construction, the piles could not be finished, either the driven piles were broken or they could not be driven in. Later, an old mage was invited to make a field trip. He said that this is the place for leaders and a memorial ceremony must be held. Later, the construction unit did it according to the advice of the old mage. During the construction, the pile could really be driven in, but it soon died because of the leak of the old mage.