To see why, go the village of Qilin, a lush expanse of paddy fields, bamboo and maize about 60km (38 miles) north-east of Chongqing city.

• 想知道为什么，去看看麒麟村，重庆市东北60公里处一个盛产稻谷、毛竹和玉米的村落。