Webber's guide to Shanghai track

Red Bull's Mark Webber goes on a walk of the Shanghai International Circuit with BBC Sport's Jake Humphrey, discussing the "super fast" first corner and commandeering a tour bus along the way.

The Red Bull racer, 35, also tells Humphrey it is "too early" for him to retire at the end of the season despite speculation that the 2012 season will be his last with the reigning constructors' champions, and that he feels like he is recapturing his title-challenging form of 2010.

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