Sudan's oil wealth and soaring energy prices have given President Omar Bashir a powerful ally on the U.N. Security Council -- China -- as the East African nation battles demands for economic sanctions over atrocities in Darfur. Largely overlooked by the outside world, China has become the key player in Sudan's oil industry, as evidenced by the metallic maze of chimneys, pipes and vents that glitters on the horizon outside Khartoum. The sparkling new oil refinery is a crown jewel for Sudan's military regime, forming a vital artery for a thriving oil industry that contributed nearly $2 billion to government coffers last year. Without this windfall -- likely to be far larger this year -- analysts say it would be difficult for Mr. Bashir to maintain his military machine, let alone wage war against rebels in the western region of Darfur. Energy-hungry China has invested more than $15 billion in Sudanese oil through the China National Petroleum Corp. (CNPC), a state-owned monolith. The cost of Khartoum's new refinery alone was about $700 million. Freshly painted billboards in Khartoum carry pictures of smiling Chinese oil workers and the slogan: "CNPC -- Your close friend and faithful partner." [more]