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  ______     ___     _____      _____    _    _   
 /_   _//   / _ \\  |  __ \\   |  ___|| | || | || 
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   | ||    | \_/ || | |__/ ||  | ||__   | \\_/ || 
   |_||     \___//  |_____//   |_____||  \____//  
   `-`'     `---`    -----`    `-----`    `---`

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發送短信 : The demand for gasoline in China: A cointegration analysis