A farmer trades waste for daily necessities at a waste recycling point in Tonglu County, east China's Zhejiang Province, June 10, 2019. Farmers in five villages of Tonglu County can trade waste for books and daily necessities, as a way to promote garbage resorting and protect rural environment.

Volunteers sort garbage at a waste recycling point in Tonglu County, east China's Zhejiang Province, June 10, 2019. Farmers in five villages of Tonglu County can trade waste for books and daily necessities, as a way to promote garbage resorting and protect rural environment.

Farmers trade waste for beverage at a waste recycling point in Tonglu County, east China's Zhejiang Province, June 10, 2019. Farmers in five villages of Tonglu County can trade waste for books and daily necessities, as a way to promote garbage resorting and protect rural environment. (Photos: Xinhua)

Farmers trade waste for books at a waste recycling point in Tonglu County, east China's Zhejiang Province, June 10, 2019. Farmers in five villages of Tonglu County can trade waste for books and daily necessities, as a way to promote garbage resorting and protect rural environment.

Volunteers check garbage brought by farmers for recycling at a waste recycling point in Tonglu County, east China's Zhejiang Province, June 10, 2019. Farmers in five villages of Tonglu County can trade waste for books and daily necessities, as a way to promote garbage resorting and protect rural environment.

A volunteer (front) helps farmers recycle garbage at a waste recycling point in Tonglu County, east China's Zhejiang Province, June 10, 2019. Farmers in five villages of Tonglu County can trade waste for books and daily necessities, as a way to promote garbage resorting and protect rural environment.