There were many good things in the Damakan market, but Li Du was not impressed with the value of them.
There were too many stone fragments. Even if there was jade hidden in them, they were small, hardly worth above ten thousand dollars, so it was not worth the effort for Li Du.
However, Da Mao regarded these things like a treasure. He and the other two entered the night market, and he would stop at each stall for a long time, turning the stones over and over and getting excited over every stone that might contain jade.
Li Du followed and watched for a while. He was testing Da Mao's ability.
Da Mao was indeed talented in evaluating stones. It was because he was influenced and taught by his family since he was young, and later got in touch with more of the same in his job when he was older. Jade was his life, so he had grown very capable.