GRASS, LIKE NEARLY EVERYTHING else in China, is subject to political interpretation. Historically, the Chinese have taken a dim view of grass. In Peking's parks, the dirt is swept daily, since cleanliness is prized, but gardeners relentlessly uproot any tuft of grass. Grass breeds disease, generations of Chinese have been taught. Additionally, Communist doctrine teaches that grass is decadent, since it is usually associated with leisured classes and generates exploitation--one man hiring another to cut it.