Venezuela and China Wednesday signed 12 cooperation agreements and doubled their joint investment fund to 12 billion dollars, as Vice President Xi Jinping's wound up his visit before heading to Brazil. The China-Venezuela investment fund, set up in 2007 with a starting capital of six billion dollars, was boosted to 12 billion, with China contributing eight billion and Venezuela the rest, officials said. "The fund is part of the strategic alliance that bolsters our common interests and confirms Venezuela's standing as an oil-providing partner (to China) for the next 500 years," President Hugo Chavez after meeting with Xi. Chavez said the joint fund would be invested in education, health and infrastructure programs in Venezuela. The 12 cooperation agreements include one calling for Venezuela's state-run oil company PDVSA to sell China's National Oil Company between 80,000-200,000 barrels of oil per day to pay off a debt between development banks in both nations.