Pearl as a Sword: I Kill from the Bottom of the River Through the Court

On the night when my whole family was exterminated, I jumped into the Huai River and pretended to be dead, becoming the meanest pearl diver. The enemy doesn't know that the Ling family's ancestral clam identification technique can reveal more than just the color of pearls - There are also black and white people's hearts and undercurrents in the court. From then on, pearls became swords and the Huaihe River became chess. I fought my way up to the court from the mud at the bottom of the river...