The number 8 is considered lucky in Chinese popular culture. The Beijing Olympics, for example, took place in August, which is not the best month to be here, so that the opening ceremony could start at 8:08pm on August 8, 2008.
United Airlines, which has a major hub in San Francisco, labeled its daily flight from Beijing to San Francisco the flight United 888. The flight from San Francisco to Beijing is United 889. Without looking (no cheating!) guess what is United flight 887?