C2431 Give an Explanation

Swoosh!

An arrow pierced through the clouds and flew into the sky.

Bang.

The Cloud-Piercing Arrow exploded, and the firework scattered in all directions. It condensed into a Vermillion Bird that was flying with its wings spread out.

This was the signal sent by the city guard leader.

The city gates of the Vermilion Bird City were destroyed by someone and the matter became big