High in the upper reaches of North-West China lies a land filled with riches. For it’s here, on the banks of the Yellow River and in the shade of the mist-covered Liupan Mountains that the people of the Ningxia region have been growing one of Asia’s most sought-after foods for centuries.

This small, oval-shaped berry has been called the “red diamond” as it is thought to have anti-ageing powers and has achieved newfound global status as a superfood, but to the people of China, who have being using it medicinally since the 3rd Century, it’s simply called the goji berry or wolfberry.