Does Maoming dialect belong to Cantonese?

Strictly speaking, Maoming dialect belongs to Cantonese.

Cantonese refers to Guangzhou dialect. Therefore, the Cantonese dictionary is based on Cantonese; The official Cantonese radio stations, including Cantonese movies and TV plays, are all in Cantonese.

Although both belong to Guangdong, Maoming dialect is very different from Guangzhou dialect. The netizen downstairs is right, Guangzhou people may not understand Maoming dialect.