https://archive.freecapitalists.org:443/blogs/sinocenter/pages/252959.aspx“不”的音变 "No" sound change Generally speaking, the word ’ No ’ would have no other pronunciation except the pronunciation b ù , that is, No ’ s basic tone is 去声 . Now look at the following cases: 1. When singlyenCommunityServer 2008.5 SP2 (Build: 40407.4157)