Bai Tu stood still for a long time, and the time on the watch had passed for ten minutes, and she noticed that the small print on the lower line had increased by one bit.

【4929】

What exactly does this number represent, and what is its special significance?

Is it the date, or the number of people?

A foul smell brought Bai Tu's thoughts back.

It was a foul-smelling, black, viscous liquid left behind by the sludge, which looked like crude oil, but it had another unpleasant smell.

It's like meat that's been rotten for a long time, and it smells sour and smelly.

She dipped a pen on the table with a little black liquid, and the cap was immediately corroded into a hole, Bai Tu's eyebrows jumped, and the whole pen was put into the liquid, and the pen was quickly corroded and melted, merging with the black liquid.

A bubble emerges from the black liquid and slowly grows larger, making a slight "pop" and the liquid sputters.

Bai Tuyan quickly pulled over the chair to block it, and in his heart, he quickly left for Area D around the puddle of liquid.

*

Hanshu disappeared from Bai Tu's field of vision and turned a few corners, stopped, leaned against the wall and stared at his empty wrist, the corners of his mouth curled in a small arc.

"Goo."

The sludge monster struggled to catch up with Hanshu's pace, making a "grunt" sound as if gasping for breath.

"Standing there, it stinks." Hanshu stopped at it, "Okay, get out." ”

The mud monster paused, small bubbles kept popping up on its body, and it turned and left.

It's also going to find the one who looks delicious.

The black mist that lingered outside the window pierced through the glass and drifted to Hanshu's side, carefully touching the wrist that he had been carrying a watch.

Han Shu casually slapped away the black mist, watched him recondense and weigh again, and whispered, "Where did she go?" ”

…

"Well, I'll be over later."

*

It took only fifteen minutes to run from Area A to Area D without any obstacles. There was still an hour and a half before eleven o'clock when the nurse delivered the medicine.

There are five laboratories in Section D, but there are seven keys, which are also distinguished by the letters A to E.

There is no label on each one.

Blind guessing?

Bai Tu picked up a key and wanted to insert it into the keyhole of Lab A, but a cold and calm voice sounded in his head: "Please choose carefully, players will be punished for wrong key pairing." ”

This was the first time she'd heard a game reminder, or warning, since she came into the world. It's the same as the nurse's voice.

Bai Tu's pupils contracted, and he immediately withdrew his hand and asked, "What punishment?" ”

The voice didn't speak again.

The key was held tightly in her hand, the lab was in front of her, and she couldn't do the easy task of opening the door.

If you can't try one by one, what should you do?

"What to do." She muttered to herself.

There was still an hour until eleven o'clock.

Bai Tu spent half an hour carefully observing the laboratory and the keys in his hand.

There are only slight differences between the keys, which are almost negligible, and there are no traces of lettering or labeling on them, even to the same extent as new.

And the doors and keyholes in the laboratory are not much different.

Stuck in a predicament, Bai Tu stared at the watch, watched it go for ten minutes, and asked in a low voice, "Can you unlock it?" ”

No response.

She put the key back in her pocket, opened the fire hydrant box in the hallway, and took out the axe inside, and twisted it in her hand.

Han Shu knew the rules of the game, and before rushing to the laboratory, he was still wondering if Bai Tu was wrinkled and annoyed, and he didn't expect to see her violently tearing down the door with an axe.

Bang——!

The lock is broken.

The door opened.

Hanshu: "......"