"Banana kids? Yellow outside and white inside". They are between 10 and 20 years old, French of Chinese origin who, with hindsight and humour, claim to be "banana kids". Their parents came to France in the eighties at a time when Chinese immigration widely intensified, and all these adolescents born in France do not speak Chinese. We follow them during their first trip to China where they go to learn Chinese at a language school in Beijing. Their linguistic stay takes place in a state campus called "Root seeking".