Ms. Song shook her head and said, “This is the tenth floor. How could the crows fly that high up? Maybe you guys have a lot of Yin energy and that's why you have attracted the crows…”

“We’re not the problem. The problem here is the bronze mirror,” I said then knocked on the mirror. “Listen.”

Ms. Song listened but still hesitated. She asked cluelessly, “What about that?”

“Have you ever knocked on this bronze mirror?” I asked.

Ms. Song shook her head, “No, do you mean that those crows were attracted to the knocking sound in the mirror? No kidding, my room is soundproof. People from the outside can’t hear anything.”

“I seem to understand what’s going on.” I suddenly thought of a possibility and felt excited. “Is this sound similar to a crow cawing?”

Then, I knocked on the bronze mirror two or three times.

Ms. Song and Li Mazi exchanged looks. Then, they gave me a nod. “Yeah, it sounds somewhat ...