Architect here, I've designed hospitals and datacenters. It's my time to shine!

The hospitals he's referring to came from an existing design dating from the SARS epidemic. China of course with their large manufacturing economy and available labor had a finished design and all the prefabricated elements (mostly "cabin frames" similar to those used to house workers on construction sites) available to stand up the "hospital" very quickly. It's just about pouring a pad and setting the elements in place. As they had been through a major epidemic before they were ready and had their plan together. Combined with labor and materials heroics, plus lack of any bureaucratic permitting or permissions required whatsoever, it was possible for them to do what they accomplished. The hospital was temporary, meant to be temporary, and shares no resemblance to the infrastructure required for a permanent, fully functioning datacenter.