Siyi Yue has a representative dialect that is related to what larger language?
Siyi Yue Siyi (Seiyap or Sze Yup in Cantonese; ) is a coastal branch of Yue Chinese spoken mainly in Guangdong province, but is also used in overseas Chinese communities. Within the province, it is mainly spoken in the prefecture-level city of Jiangmen, but pockets exist outside of Jiangmen, including the Doumen and Jinwan districts in Zhuhai, Guzhen in Zhongshan and Jun'an in Foshan. Taishanese, which was one of the most important Chinese dialects in Chinese American communities, is considered a representative dialect.
Tong-Tai Mandarin Tong–Tai (Chinese: 通泰), also known as Tai–Ru (Chinese: 泰如) is a group of Lower Yangtze Mandarin dialects spoken in the east-central part of Jiangsu province in the prefecture-level cities of Nantong (formerly Tongzhou) and Taizhou. The alternative name refers to the county-level city of Rugao within Nantong. This region includes the areas which are to the north of Yangtze River and to the east of Grand Canal. There are about 11.37 million speakers there (in 2004) and this region occupies about 15,000 square kilometers.