I suppose 'heart warming' are the first words that come to mind but lest that put anyone off, I have to say that it is the way Mr Zhang involves us from the very beginning that is the reason for the film's success. Beautifully shot with some wonderful natural light, our first glimpse of the rural backwater is astonishing. Almost immediately though we are drawn into a drama involving a thirteen year old girl being put in charge of a school of youngsters. The usual teacher has to visit sick relatives for a month and he leaves the girl behind with specific instructions to keep the schoolchildren from leaving school. Hence the film's title. Of course one goes missing and she follows to the city to try and find him, which becomes the story of the film. It is fascinating to see and believe the degree of poverty in the village and wonder as the children do at the difficulty of surviving in either place. The young girl may be acting less out of altruism than self interest but our eyes do not leave her and her concerns are ours. Seemingly non professional cast do a magnificent job, which must in no small part be down to Zhang, but then nobody seems to put a foot wrong. Excellent.