Probing Brother Jiu

Jin Cheng could not see the man's face in the dim light, turning instead to the glinting dagger that had caught his eye.

Under the flickering lamplight, the blade gleamed ethereally. Jin Cheng bent down to pick up the dagger, inspecting it as he did so. "Why was he threatening you?"

The guard captain responded, "Sir, this man is a spy. He wishes to speak with Master, claiming he is Master's son. I was sceptical of the man's claims and had him arrested for trespassing but ended up as his hostage instead. Do not trust him. He undoubtedly harbours ill intentions towards Master!"

Jin Cheng rolled the dagger in his palm thoughtfully while admiring its craftsmanship. When he heard the guard captain's report, his head shot up, and he asked, "So the man believes Brother Jiu is his father now, does he?"

"That's what he said. He wanted to ask Master if they were related," the guard captain reported.

How could Brother Jiu have such a big son?