Behind China's Silk Road vision: cheap funds, heavy debt, growing risk

By Shu Zhang and Matthew MillerBEIJING (Reuters) - Behind China's trillion-dollar effort to build a modern Silk Road is a lending program of unprecedented breadth, one that will help build ports, roads and rail links, but could also leave some banks and many countries with quite a hangover.At the heart of that splurge are China's two policy lenders, China Development Bank (CDB) and Export-Import Bank of China (EXIM), which have between them already provided $200 billion in loans throughout Asia,