将下面关于广交会介绍的段落翻译成汉语(可参考视频2 多姿多彩的会展活动) China Import and Export Fair, also known as the Canton Fair, is held annually in Guangzhou every spring and autumn, with a history of 57 years since 1957. The Fair is a comprehensive one with the longest history, the highest level, the largest scale, the most complete exhibit variety, the broadest distribution of overseas buyers and the greatest business turnover in China.