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This information was mentioned in other table tennis forum and players who played with old and new DHS W968 (National) did a comparison.
You can choose not to believe.
you mentioned Wang Chuqin and Sun Yingsha's blades then you back up your information by saying "players who played with old and new DHS W968 did a comparison"? who are those players? are they in the National team? are they using the same blades that Wang Chuqin and Sun Yingsha use?