Chinese state-run news agency Xinhua reported Chinese lawmakers adopted the amendment to China's renewable energy law during a National People's Congress Standing Committee meeting.
The amendment also requires the State Council Energy Department and the state power regulatory agency to "determine the proportion of renewable energy power generation to the overall generating capacity for a certain period."
Under China's renewable energy law, electricity grid companies will face sizable fines if they fail to purchase power generated from renewable resources such as non-fossil fuels or wind and solar power.
The law and its adopted amendment come about as China remains reliant on coal as a power supply. Two-thirds of the country's power supply comes from coal, Xinhua said.