The one having a sword is Zengzhang heavenly guardian. He is guarding the southern world. Next to him sits Chiguo heavenly guardian who is protecting the eastern world. He is holding a pipa, a four stringed Chinese lute. Opposite to him is Duowen heavenly guardian who is keeping the northern world. He is grasping a huge umbrella. The last is Guangmu heavenly guardian having a water snake. He is in charge of the western world.