The black fog bubbled up in the cave, but it remained in the same spot and didn't venture out.
When it heard what Sima You Yue said, its bubbling became even more intense.
"Who am I?" That voice was filled with puzzlement, and only said after a long while, "It's been a long time since I thought of this question. It seems a bit hard to recall."
"How long have you been sealed in this place?" Sima You Yue looked at that black fog and said with a tint of fear.
"How long? I can't remember." Black Fog said, "I can't even see the rising or setting of the sun. It's natural that I won't know how many years I've been here. It could be a few thousand years, it could be a few tens of thousands."
Sima You Yue's heart shook. He had been sealed here for so long that he couldn't even tell how long it had been. Just how many years had it been!
"Who am I? How long have I been here?"