A farmer in Caojiagou village of Liulin county, North China's Shanxi province enjoys a bumper harvest of fireweed, or kochia scoparia, this year. (Photos: China Daily)

Farmers in Caojiagou village of Liulin county, North China's Shanxi province enjoy a bumper harvest of fireweed, or kochia scoparia, this year.

An aerial view of a field of fireweed, or kochia scoparia, in Caojiagou village of Liulin county, North China's Shanxi province.

Farmers in Caojiagou village of Liulin county, North China's Shanxi province enjoy a bumper harvest of fireweed, or kochia scoparia, this year.

A farmer in Caojiagou village of Liulin county, North China's Shanxi province enjoys a bumper harvest of fireweed, or kochia scoparia, this year.

An aerial view of a field of fireweed, or kochia scoparia, in Caojiagou village of Liulin county, North China's Shanxi province.