I want to know the answer to the following question:
Throughout history there have been a series of what in the area to allow for better communication?
All the background I'm provided with is that "Since the founding of the People's Republic of China in 1949, Mandarin, which is not mutually intelligible with any of the local dialects, has been promoted as the standard language of communication throughout China.". Is that enough to answer the question?
Answer: no