Near the edge of the Sahara Desert, in Egypt’s West Minya, Chinese drillers bore deep into the earth, tapping groundwater to irrigate a once 500-hectare stretch of desert – now home to the world’s largest beet sugar factory.China’s Zhongman Petroleum has drilled 193 wells over the past three years to irrigate the farm, which supplies Canal Sugar – a joint venture backed by investors from the United Arab Emirates and Egypt – with an annual capacity of 900,000 tonnes, according to the state-run...