China’s richest man, Zhong Shanshan, has come under scrutiny in the small northeastern US state of New Hampshire, home to just over 1 million residents, over a plan to develop an industrial site in the state’s second-largest city, Nashua.The controversy began in May when it emerged that a US subsidiary of Zhong’s firm, Nongfu Spring, NF North America, had quietly acquired a single-storey building on a 9.3-hectare (23-acre) industrial site in Nashua in January.The site had been abandoned for...