How do oil sellers evaluate Chen Ke's consulting skills and good archery?

Chen Yaozi was good at archery. At that time, no one in the world could compare with him, and he was proud of it. Once he put an arrow in his garden, an old man selling oil put down the burden he was carrying, stood aside and looked at him casually for a long time. When the old man saw that Chen Yaozi could shoot eight or nine of the ten arrows, he just nodded slightly in agreement.

I just think it's okay.