The photo, taken on December 11, shows science popularization volunteers instructing students in launching "rockets" at the Furong Primary School in Maogou Town, Baojing County. The school launched its annual Science and Technology Festival that day. The event enabled students to have an up-close experience of the charm of science and technology through experiments and science popularization products display. (Photo/Yu Caihua and Xiang Wei)

The photo, taken on December 11, shows a science popularization volunteer instructing students in making super bubbles at the Furong Primary School in Maogou Town, Baojing County. (Photo/Yu Caihua and Xiang Wei)

The photo, taken on December 11, shows a science popularization volunteer instructing students in making airplane models at the Furong Primary School in Maogou Town, Baojing County. (Photo/Yu Caihua and Xiang Wei)

The photo, taken on December 11, shows students having fun with airplane models at the Furong Primary School in Maogou Town, Baojing County. (Photo/Yu Caihua and Xiang Wei)