Intelligibility
Its native speakers generally understand Shanghainese, but not vice-versa. It is not at all mutually intelligible with Mandarin, China's official language. Ningbo dialect is considered a Yongjiang dialect or Mingzhou dialect (as both terms are synonymous), and is closely related to the Taihu Wu dialects of Zhoushan. In terms of inter-intelligibility between dialects within the Mingzhou/Yongjiang subgroup, they can be more accurately described as 'accents' (腔) as these dialects are relatively uniform and almost identical to each other aside from pronunciation differences and some minor lexical differences.
Read more about this topic: Ningbo Dialect