"So you went around a second time?"
On the walkie‑talkie channel, Xing Hechou sounded puzzled. "And nothing happened?"
"No, it wasn't a second lap."
His teammate Wang Buliuxing thought for a moment, then his eyes lit up. "Strictly speaking, if you look from above, they've gone through a total of seven rooms and traced a tiny figure‑8 symbol.
And during that detour, the conditions they encountered also changed—when they entered the starting room for the first time, the candle automatically lit from an extinguished state, and the back door automatically opened,
but when they entered the starting room the second time, the door on the right,
or the door at the rear from the original perspective, was also open.
However, the candle was automatically extinguished,
which means that after they left the starting room again, the candle in that room went out for some reason."
"The candle went out?"
