The China Railway Construction Corporation's eye-popping $12 billion deal to build an 870-mile railroad in Nigeria is the biggest single overseas contract in Chinese history and will boost the country's manufacturing sector just as its overall economy shows some signs of slowing. 

China has global ambitions to export its technology, with the twin objectives of securing access to energy and other commodities in return for financial and technical support. The Indian ventures would be a stepping stone towards realizing ambitious proposals to build high-speed railway lines from China to Europe, North America and Southeast Asia, and across South America and Africa.