West Africa has embraced Chinese green tea – from government offices in Mauritania to roadside stalls in Senegal, Mali and Niger, it is at the heart of a tradition that brings people together. The ritual – known as ataya, or attaya in some countries – involves preparing and serving strong, sweet green tea in three rounds, giving family, friends and colleagues the time to talk and socialise. Chinese tea dominates several markets where ataya is widely consumed. More than 90 per cent of...