SHANGHAI, Feb. 15, 2012 (Xinhua) -- A cleaner works on the square in front of the Shanghai New International Expo Center which is fully completed in Shanghai, east China, Feb. 15, 2012. The Shanghai New International Expo Center possesses 17 similar single-layer non-pillar halls and its total exhibition area is about 300,000 square meters. The first phase of the center, which has been opened in November of 2001, held about 80 exhibitions per year. (Xinhua/Pei Xin)