I returned to the Doctor's side and found that old ghost was there too.
"When did you get here?"
"Just now. Sigh, what a pity. I should've gone with you," Old ghost said.
The Doctor shot him a sidelong glance. "For what? To hold them back or go get yourself killed?"
Old ghost looked displeased. "I don't like the sound of that. Why would I definitely hold them back or definitely go get myself killed? Maybe I could've helped them."
The Doctor ignored him and asked me, "Settled?"
I knew he was asking about the two Ying Gous. I nodded. At least they were no longer hostile toward each other or fighting fiercely. Now that they knew the other was themselves, there was no point in fighting anymore.
"I just still can't figure out what exactly is going on."
Although the Doctor had put forward the most plausible hypothesis, it was ultimately only a hypothesis. Even now, how the other Ying Gou had appeared remained a mystery to me.
This time, there was an extra Ying Gou. Who knew who might show up next time?
Old ghost was full of curiosity. "What happened? Tell me!"
I glanced at the Doctor. He actually hadn't told old ghost about this.
The Doctor understood what I was thinking. "You came right after he did. I didn't have time to tell him."
So the Doctor told old ghost about the appearance of the two Ying Gous. Old ghost rather agreed with the Doctor's hypothesis. Something similar to the Twin Fish Jade Pendant had probably replicated another Ying Gou, but he couldn't explain why it wasn't a mirror image of the original. He even suggested it might work like 3D printing, directly creating a perfect copy.
The Doctor and I both brightened at that. It