Diluc went to Liyue to meet a ship with an important commodity that requires his personal presence. He was supervised the unloading work of necessary things, discussing the work with one of the sailors.

A sharp clap interrupted the dialogue between the two men. A rather heavy tail hit the metal walls and an opaque and obviously dense container with water.

"What's inside? that creature?"

The answer was 'yes'. Inside a rather large container is a mermaid/man mistaken for a siren.