Sū shēng / Sūshēng
original: 苏笙
Wong states that the instrument is popular in the Jiangxi region [capital: Nánchāng (南昌)], but 苏 (Sū) is short for prov. Jiāngsū (江苏 [capital: Nánjīng (南京) [= Nanking], 470 km NE of Nánchāng]), which seems to make more sense, because it borders on Shāndōng (山东), which is one of the other provinces mentioned by Wong in the concerning paragraph (➺ Yuán shēng, popular in Hebei (河北), &c.).
Wong, Samuel Shengmiao: Qi’ - An instrumental guide to the Chinese orchestra. Singapore, 2005, p.136.
汉英词典 (Hàn Yīng cídiǎn) / A Chinese-English dictionary. 北京 [Běijīng], 1985, p.653 & 613.