Hao Jian was holding the notes, baffled about what to say, while Weiwei turned around and went inside the room, doing something unknown. Suddenly, with his head down, Hao Jian heard a "bang" sound out of instinct, and immediately thought something had happened, standing up in a defensive posture.
He paused for a moment, realizing it wasn't anything serious, but rather the light bulb in the room had suddenly gone out and burst with a loud bang. At this moment, the light bulb was broken, exploded, leaving the room in complete darkness. Hao Jian turned on his phone's flashlight and walked inside.
Weiwei was clearly not frightened; she was instead visibly irritated, looking up at the broken light bulb. Perhaps she was thinking about how inconvenient the timing was—it happened right after she entered the room, which startled her.
