Deep inside the tropical forest of Gabon, 500 miles from the coast, China is going where no other investors dare. A Chinese consortium, led by the China National Machinery and Equipment Import and Export Corporation, has won the contract to develop Gabon’s massive Belinga iron ore deposit. In return for purchasing the entire output, Chinese operators will build not only the extractive infrastructure at Belinga but a hydro-electric dam to power it, a railway to the coast, and a deepwater port north of the capital, Libreville, for exporting the ore.