are these just players registered under new names or what
cause how does only one of these players have an actual vlr page
Most CN academies are proper academies that serves to build up players. Most of the times if they play in the NatComp (China's T2), they'll play under a different banner, but still complied/connected to said academies.
Also NatComps are usually sometimes hard to track if we don't get enough information, so most of the time you'd better off go to https://haojiao.cc for them.