CHICAGO/NANTONG, China (Reuters) – At a Caterpillar facility in the eastern Chinese city of Nantong, an array of excavators, earth movers and road-making machinery is displayed on slopes and in mud pits. The audience is Caterpillar’s local network of dealers, who inspect the machines for the latest technological innovations to help make their sales pitches to buyers in China. Caterpillar has been investing heavily in China – the Nantong facility is one of 25 similar ones it has set up across the country – in the hopes of cracking the largest construction and mining equipment market in the world.