Economic Watch: Low-carbon demo projects illuminate green future amid China-EU climate cooperation

QINGDAO, Sept. 17 (Xinhua) -- Summer in the coastal city of Qingdao in east China's Shandong Province is often warm and sultry, with humidity heightened by the evaporation of seawater.

However, in Zhang Jie's apartment at Qingdao Sino-German Ecopark, there isn't an air conditioner in sight.

Featuring neither an air conditioner nor a heating radiator, Zhang's apartment is instead equipped with a fresh air