What is "ayu-mi-x"

Ayu-mi-x remix album is the first remix album that Ayumi Hamasaki has released. The album was released on March 17, 1999 to promote A Song for ××. Ayu-mi-x remix album contains 2 discs. Disc 1 is the Remix Club Side which contains dance remixes. Disc 2 is the Acoustic Orchestra Side which contains orchestral remixes and 3 dub mixes.