At China's largest eco-friendly pig-raising farm, there is no smell and no pig manure underfoot. The 200 million yuan facility in Fengxian county, Jiangsu province, has more than 6,000 organically bred pigs.

In contrast to traditional pig farms, this farm is much tidier, thanks to newly developed technology, which can compost pig manure. In the pigpen there is a bed of micro-organisms, straw, manure and rice hulls which composts wastes without leaving behind any foul smell.

The owner of this eco pig farm, Nanjing-based Fu Teng Agriculture and Animal Husbandry Company, said it intends to build a nationwide network of pig farms to raise 1.8 million pigs within the next five years. The company currently has another two eco pig farms under construction in two counties in Nanjing.