Jun. 17, 2009 (China Knowledge) - PetroChina<601857><0857><PTR>, the country's largest oil producer, is seeking a partner to offer crude oil for a proposed refinery that will cost RMB 15 billion and will be located in a chemical industrial park in Changshou District, Chongqing Municipality, sources reported. Wang Yilin, vice general manager of PetroChina's parent, China National
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