Shikoudi District, fifty meters underground.
A person-high brass tank is firmly fixed in the center of the magnetic levitation field by four robotic arms.
"Very good, release the robotic arm." Someone clapped their hands.
The mechanical arm carefully moved away, and the brass tank was steadily suspended in the magnetic field under the low-temperature liquid nitrogen atmosphere, surrounded by a half-meter thick quartz glass wall. It was like a developing fetus sleeping in the mother's womb, and the mother was this special oval quartz glass cover, which did not use any metal at all. It took all the technicians of a glass company in California a year and a half to burn it to ensure that it met the customer's demanding requirements.
"Perfect!" The entire team of researchers in white lab co
