For the past eight years, Liu Zhijun was one of the most influential people in China. As minister of railways, Liu ran China’s $300 billion high-speed rail project. U.S., European and Japanese contractors jostled for a piece of the business while foreign journalists gushed over China’s latest high-tech marvel. Today, Liu Zhijun is ruined, and his high-speed rail project is in trouble. On Feb. 25, he was fired for “severe violations of discipline” — code for embezzling tens of millions of dollars. Seems his ministry has run up $271 billion in debt — roughly five times the level that bankrupted General Motors. But ticket sales can’t cover debt service that will total $27.7 billion in 2011 alone. Safety concerns also are cropping up.