Patrick Chovanec of Tsinghua University says this is just the start.

清华大学的帕特里克·邱伐内克说这仅仅只是一个开始。

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And even if there was a downgrade of U.S. sovereign ratings, Patrick Chovanec from Tsinghua University says it probably wouldn't change that much.

即使美国的主权信用评级降低，清华大学的帕特里克·裘万尼认为这可能对上述债务影响不大。

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"It's not just more people driving, it's also every product that you buy is made of plastic or synthetic materials out of China is made with oil, " said Patrick Chovanec of Tsinghua University.

CNN: Oil increases to highest level since 2008