Bats, Radar

It had originally been a dark night, with only faint moonlight.

The river shimmered, rippling with reflected light.

This was the second time Ye Jinghong and I had walked along this riverbank, but our moods were completely different.

I had no idea what awaited us in that castle beneath the dark night, but the closer we got, the stronger that sense of danger became.

We were less than thirty meters from the castle.

Yet the already dim moonlight vanished as well.

We were plunged into darkness, unable to see our own hands before our faces.

I was all right. Even in such darkness, I could still see, though my vision was much worse and lacked clarity.

Still, I did not feel panicked.

Ye Jinghong, on the other hand, grabbed my hand tightly and pressed her whole body against me.

"It's so dark!" Her voice trembled slightly.

I frowned. She seemed to be afraid of something.

Was she afraid of the dark? But why had I never noticed before?

"Can't you see anything at all?" I asked her.

"Huh? Yes, I can't see." She was still terrified, faintly uneasy.

I said, "We've been through darkness before. I never saw you like this then."

She shook her head hard. "It's different. Different from every other time. No matter how dark it was before, I could still see clearly, even when I couldn't see my hand before my face."

My eyes widened. "You can see at night too?"

"Yes, but..." She hesitated.

I said, "Is it inconvenient for you to talk about?"

She gave a bitter smile and shook her head. "There's nothing I can't say. The reason I can see in the dark is that my eyes were modified. They have long-range infrared vision."

So that was it. But if so, why