Among the Kejia people,
tea-growing is a family business.
Women do the picking,
while the men process and pack it.
Mrs Zhang belongs to a Kejia family that has lived and worked for generations among these same tea terraces.
The finest tea needs to be gathered quickly in warm sunshine as this brings out the flavour-enhancing oils inside the leaves.
This sustainable industry has protected one of China's finest landscapes and one of its most traditional cultures.