Customers are seen at the autumn session of the biannual Canton Fair, or the 112th China Import and Export Fair, in Guangzhou, capital of south China's Guangdong Province, Nov. 4, 2012. The autumn session of the Canton Fair wrapped up on Sunday, showed a drop over 10% in both transaction volume and fair attendance. As China's largest trade fair, Canton Fair serves as the barometer indicating China's export situation. [Xinhua]