In this Oct. 5, 2004 file photo, a 3 year-old "blue agave" plant, the prime material for the production of Tequila, grows in a Casa Cuervo agave field near the town of Tequila, Mexico.

 

              In this Oct. 5, 2004 file photo, a 3 year-old "blue agave" plant, the prime material for the production of Tequila, grows in a Casa Cuervo agave field near the town of Tequila, Mexico.
In this Oct. 5, 2004 file photo, a 3 year-old "blue agave" plant, the prime material for the production of Tequila, grows in a Casa Cuervo agave field near the town of Tequila, Mexico. Since China's President Xi Jinping and Mexico’s Enrique Pena Nieto broke a diplomatic and economic chill and agreed to boost trade in 2013, Mexico's tequila producers have been gearing up to make the world’s most populous country their second-biggest market, after the margarita-loving United States. (AP Photo/Guillermo Arias, File)