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Who knows how many units Yanchang Petroleum has in Xi 'an?

Yanchang Oilfield Co., Ltd. Yanchang Petroleum Group Refining and Chemical Company Yanchang China Coal Yulin Nenghua Company

Yanchang Petroleum Group Mining Company Yanchang Petroleum Group Oil and Gas Exploration Company Yanchang Petroleum Group Pipeline Company

Yanchang petroleum group sales company Yanchang petroleum products distribution company Yanchang petroleum international exploration company

Yanchang Petroleum Group Finance Center Yanchang Petroleum Group Research Institute Yanchang Petroleum Yan 'an Nenghua Company Yanchang Petroleum Yeyi Company

Shaanxi Xinghua Group Company Shaanxi Xinghua Stock Company Shaanxi Huajian Engineering Company Yanchang Petroleum Huajian Company

Katie Northwest Rubber Company Yanchang Petroleum Rubber Co., Ltd. Yanchang Petroleum Hotel Management Company Beijing Engineering Company

Shaanxi Photovoltaic Industry Co., Ltd. Northwest Research Institute of Chemical Industry Shaanxi Petrochemical Research and Design Institute Shaanxi Light Industry Research and Design Institute