Sebastian Vettel insists that Red Bull is still learning about the new RB9 going into the Chinese Grand Prix this weekend in Shanghai.Vettel tops the championship standings on the back of his controversial victory in Malaysia last month while Red Bull also leads the constructors' title race thanks to the 1-2 finish it secured at Sepang.The Milton Keynes-based outfit therefore heads into the third race of the year expected to challenge at the head of the field once again, although Vettel said it was difficult to know what to expect before the cars hit the track."We learned quite a bit from the first two races but China will be different again," he said. "It's a different...
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