The Beijing dialect (simplified Chinese: ; traditional Chinese: ; pinyin: Beijinghua), also known as Pekingese, is the prestige dialect of Mandarin spoken in the urban area of Beijing, China. It is the phonological basis of Standard Chinese, which is the official language in the People's Republic of China and Republic of China and one of the official languages in Singapore.

Based on this passage, what kind of chinese do they speak in beijing? Let's give stream of consciousness first:
To answer this question, we should know that: The Beijing dialect (simplified Chinese: ; traditional Chinese: ; pinyin: Beijinghua), also known as Pekingese, is the prestige dialect of Mandarin spoken in the urban area of Beijing, China.
So, the final answer is The Beijing dialect.