Hello, Door-To-Door Installation of Steel Kidneys

[Future technology, just for fun] Chen Xiu travels to the future 2077. There is no cyberpunk as he imagined, but there is human beings attaching great importance to health. Here, the virus is no longer a threat to people. Here, people can support themselves through exercise. Here, the brain is at the center of everything. Chen Xiu, who traveled to the future, obtained an infinite magic treasure [warming liquid] that can repair any damage. With this treasure, Chen Xiu only dared to secretly make a fortune...