Mandarin, or putonghua, is the standard service sector language in our country. But recently employees at a big city’s subway station have been busy learning dialects of other parts of the country. Proponents say that using dialects in the subway is a way to provide better service. But opponents think that encouraging the use of dialects in public counters the national policy to promote putonghua. 

Mandarin, or putonghua, is the standard service sector language in our country. But recently employees at a big city’s subway station have been busy learning dialects of other parts of the country. Proponents say that using dialects in the subway is a way to provide better service. But opponents think that encouraging the use of dialects in public counters the national policy to promote putonghua.