C211 Grandfather Grandchild and Two Ghosts

The few people behind me looked at me in amazement, not knowing what just happened. I was also a monk, and could not make heads or tails of what had just happened. I had clearly used the "Four Symbols Sealing Technique" to summon the yellow-skinned ancestor and the Earth Binding Spirit, and the yin qi was extremely strong, far stronger than the two ghosts in the room