Long ago — roughly around the first time Mr. Wu mentioned the existence of monsters in this world — Zheng Qing asked him what to do if he encountered a monster on the way home from school.
The teacher sized him up and hummed a single word from his nose: Run.
But I can't run fast, Zheng Qing stretched out his arms and legs and looked at the teacher in despair.
The teacher thought for a while, then taught him a talisman.
The Armor Horse Charm.