Zhang Dejiang (4th L), chairman of the Standing Committee of China's National People's Congress (NPC), attends a joint group session during the 16th session of the 12th Standing Committee of the NPC to inquire the State Council about the implementation of Water Pollution Prevention and Control Law, in Beijing, capital of China, Aug. 29, 2014. Chinese Vice Premier Wang Yang answered questions at the session. (Xinhua/Liu Weibing)

A joint group session is held during the 16th session of China's 12th Standing Committee of the National People's Congress (NPC) to inquire the State Council about the implementation of Water Pollution Prevention and Control Law, in Beijing, capital of China, Aug. 29, 2014. Zhang Dejiang, chairman of the NPC Standing Committee, attended the discussion and inquiry. Chinese Vice Premier Wang Yang (3rd R) answered questions at the session. (Xinhua/Liu Weibing)

Yan Yixin, a member of the Standing Committee of China's National People's Congress (NPC), raises a question at a joint group session during the 16th session of the 12th Standing Committee of the NPC to inquire the State Council about the implementation of Water Pollution Prevention and Control Law, in Beijing, capital of China, Aug. 29, 2014. Zhang Dejiang, chairman of the NPC Standing Committee, attended the discussion and inquiry. Chinese Vice Premier Wang Yang answered questions at the session. (Xinhua/Liu Weibing)

Wang Mingwen, a member of the Standing Committee of China's National People's Congress (NPC), raises a question at a joint group session during the 16th session of the 12th Standing Committee of the NPC to inquire the State Council about the implementation of Water Pollution Prevention and Control Law, in Beijing, capital of China, Aug. 29, 2014. Zhang Dejiang, chairman of the NPC Standing Committee, attended the discussion and inquiry. Chinese Vice Premier Wang Yang answered questions at the session. (Xinhua/Liu Weibing)