Introduction to Qingtian Exploring the Sea Pine: This pine stands halfway up the stone steps. Its branches are divided into two branches, and it is tattooed all the way to the sky, overlooking the peaks. Climbing the stone steps of Nantianmen near Jinding, there are two characters "Qiao Song" engraved on the cliff next to it. It is recorded as the handwriting of Jixian, the shepherd king of Yongning Prefecture during the Daoguang period of the Qing Dynasty. The existing pine tree stump is nearly one meter in diameter, and you can imagine its former majesty.