C242 pen holder

However, I noticed a thin piece of wood on the table. It was about three inches long and one finger wide. It seemed to be very old. I asked, "What is this thing?"

Zhao Jing said: "This is the pen holder passed down from my ancestors, my grandmother gave me a present, although it is not of any use, but it is still very memorable."

I thought it was just a piece of rotten wood