i think the national games will be September and current matches are for qualifying for the actual competition .
there's no tv live, because it is just preliminary contest. Maybe some fans took some videos themselves but not many, just fragments of the matches.
you mean the table tennis event on the 12th National Game? it's from Sept. 1st to Sept. 10th. China's table tennis super league begins on Jun.19th and will lasts for 5 months.