Introduction to Jieyi Pine: There are three ancient pines on Tianmen Platform, which is surrounded by steep cliffs and thousands of feet of cliffs. One tree looks like Zhang Fei with wide-eyed tiger eyes; one tree looks like Guan Yunchang with fluttering beard; one tree looks like graceful and noble Liu Bei. The three brothers are connected by roots and branches, and have a deep love for each other, so they are called the sworn brothers.