When the Persians created their own writing system, they not only adopted the shape of the Babylonian cuneiform writing, but also borrowed the syllable principle from them. Even so, apart from having a similar appearance to Babylonian cuneiform, Ancient Persian has little in common with it. Ancient Persian is actually an incomplete alphabetic script, which consists of 36 alphabetic symbols, including 3 isolated vowel symbols (a, i, u) and 33 syllable symbols. In later periods, several ideographic symbols were also used. The application scope of ancient Persian cuneiform writing was very narrow and was mainly used to record state affairs. After the Macedonian King Alexander the Great conquered the Persian Empire in 330 BC, this writing disappeared.