A chemical laboratory building.
Crisis lurks everywhere.
Just after Ghost King Master Lang, Sakata Gintoki, Mao Li Xiaowu, Song Yun, and others entered the building one after another.
An old man with a long braid, hands behind his back, appeared at the foot of the laboratory building.
"This late at night, even an old man like me can't rest, how sinful!"
The old man shook his head, gently lifted his foot, and walked into the building.
At that moment.
In the laboratory on the fifth floor.
"Yinyin, give me that bottle of oxidizer."
Professor Tao seriously looked at the reagent bottle in front of him and said to Ye Yinyin beside him.
Ye Yinyin nodded, without speaking, walked to the side, and brought over a bottle of white powder. Then handed it to Professor Tao.
After Professor Tao added the white powder into the reagent bottle, the liquid inside the bottle slightly boiled for a moment, and then the liquid, originally white, turned pale blue.
