BEIJING, CHINA— On a Friday evening in May, more than 50,000 green-clad Beijingers streamed into Worker’s Stadium to watch the local soccer team, the Beijing National Security, play the Guizhou Harmonious Relations. Harmonious Relations lost that night, in more ways than one. The drone of vuvuzelas was punctuated with periodic chanting, mostly variations on the unprintable-in-English term shabi.