> Of the 70% of the population who can speak Mandarin, many do not do it well enough, a ministry spokeswoman told Xinhua news agency on Thursday. Keep in mind that there are many dialects of Mandarin and what this ministry is referring to is the fact that people do not speak the Beijing dialect well, which is the national standard.
Strictly speaking, 1) there are many dialects of Chinese, not Mandarin. 2) the language many Beijing people speak is not a dialect. It is an accent. Cantonese is a dialect. Wu Chinese is a dialect. Beijing Chinese is an accent. It is definitely not the national standard, although it is the closest to the national standard, compared to other accents.