Written Chinese is usually mandarin. Chinese is a phonetic language. If you want to write in Shanghainese (as in the language as part of the wu family) your ch

Written Chinese is usually mandarin. Chinese is a phonetic language. If you want to write in Shanghainese (as in the language as part of the wu family) your choice of characters for even common word would be different than if you write in Mandarin Chinese. https://en.m.wikipedia.org/wiki/Shanghainese https://en.m.wikipedia.org/wiki/Shanghainese