A visitor checks a high-speed, paper-bag-making machine displayed at the 121st China Import and Export Fair, or Canton Fair, in Guangzhou, Guangdong Province, on Monday. As China’s largest trade fair and a barometer of foreign trade, the 121st Canton Fair has about 60,000 booths for more than 24,000 companies from home and abroad. The fair will last until May 5. Canton Fair was originated in the spring of 1957 and has been held in Guangzhou every spring and autumn since. SD-Agencies