Obviously CGI'd or using wires...
No shit! The 'concept' is nothing new. At first, I was thinking 'What the Hell?... there are no electromagnets there... how could they power them without tracks or a special roadway?'
When Le Ja explained "Chengdu has a lot of unique minerals underground." I burst out laughing! Many people will read the article/watch the video and believe they have actually made a working prototype.
This explains a lot -
"Wang is studying
animation design at the department of electronic information at the Chengdu Vocational College of Agricultural Science and Technology..."