China has 55 official minorities but preserving language and culture is difficult . Comment: China likes appearance of ethnic diversity , but wider trend is of gradual assimilation . Tourism a mixed blessing ; some villages like `` human zoos ''
China has 55 official minorities but preserving language and culture is difficult . Education system prioritizes national language Putonghua . China likes appearance of ethnic diversity , but wider trend is of gradual assimilation . Tourism a mixed blessing ; some villages like `` human zoos ''