The speaker was Wang Xiaolong.
He hadn't actually planned to show himself so soon.
From the prior conversation between Li San and the bald man, he could deduce that there were other people hiding behind them.
According to his original plan, he wanted to wait for this group to drive away, then stealthily follow them and take them all down in one fell swoop!
But unexpectedly, Xiao Cui appeared at an inopportune time.
Seeing that she was about to be ravaged by Li San and his men, Wang Xiaolong had no choice but to come out of hiding.
His sudden appearance scared everyone considerably.
When they had come in, Li San and his men had carefully observed the inside and found no place to hide, nor had they seen anyone sneaking in through the back door.
So when Wang Xiaolong's voice rang out, everyone's scalp tingled with fear.
Upon seeing him stroll out, they faced him as if facing a great enemy, "Who are you?"