Learn Shanghainese at ChineseBay.com

One of the most useful resources to learn Shanghainese is Wikipedia.

Here’s what we can find in it in case you cannot access it at this moment:

Shanghainese (上海閒話 [zɑ̃̀héɦɛ̀ɦʊ̀] in Shanghainese), sometimes referred to as the Shanghai dialect, is a dialect of Wu Chinese spoken in the city of Shanghai, and the surrounding region. It is classified as a Sino-Tibetan language. Shanghainese, like other Wu dialects, is largely not mutually intelligible with other Chinese dialects such as Standard Mandarin (see Mutually intelligible languages), or even other subbranches of the Wu language group.

Shanghainese is the representative dialect of Northern Wu; it contains vocabulary and expressions from the entire Northern Wu area (southern Jiangsu, northern Zhejiang). With nearly 14 million speakers, Shanghainese is also the largest single coherent form of Wu Chinese. In Western sources, the term “Shanghainese” often refers to all Wu dialects and not specifically the particular Wu dialect spoken in Shanghai. The total number of Wu speakers is over 80 million, the second most widely spoken Chinese language after Mandarin.