Reuters September 4, 2007 SHANGHAI (Reuters) - Starbucks Corp (SBUX.O: Quote , Profile , Research ), the world's biggest coffee-shop chain, said it planned to source coffee from China for the first time as it expands in a country with more than 5,000 years of tea-drinking culture. Starbucks has been working with coffee farmers in China's southwestern Yunnan province to help them meet sourcing standards and has sent coffee shipments to the United States for testing, Starbucks China President Wang Jinlong said at the Reuters China Century Summit on Tuesday. "China does produce some quality coffee," Wang said at the summit, held at the Reuters office in Shanghai. He added that sourcing coffee from China would start "very soon, maybe in a couple of years". Some analysts say import tariffs as high as 20 to 60 percent are the reason why companies such as Starbucks are considering sourcing coffee from China. However, Starbucks' Shanghai-based spokeswoman, Caren...