Most Hong Kong children spend eight months a year at school and four months on holiday.
But 400 children in Maosi, Gansu province, have had eight months of holiday - from May to August and from November to February.
The reason is the Po River. It freezes in winter and floods in summer, blocking their path to school. But things have changed since a group of Hong Kong university students went to Maosi last month.
The 69 volunteers from local institutions - the Chinese University of Hong Kong (CUHK), Polytechnic University, the University of Science and Technology and the Professional Green Building Council - and the mainland's Xi'an Jiaotong University launched 'A Bridge Too Far'.
Under the project, volunteers spent nearly a week building a floating footbridge across the 70-metre-wide Po River.
Children can now cross the bridge to school, safe from the hazardous water below. The project started in January when CUHK architecture student Mu Jun visited the village.
Moved by the children's predicament, Mu Jun and his tutor, Edward Ng, decided to build a bridge.