The discussion is divided into the following aspects: the phonological template, the nuclear system, the onset system, inter-constituent interaction and the tone system.

At the same time, as a bridge of users and companies, Best Tone system of China Telecom has accumulated vast record datas and the platform is based on knowledge discovery of the record data.

It is compartively easy to read this "password" file, and simply try and match the tone pattern to gain access to the system.