What is the symbolic significance of Ye Zhi's poems?

As far as symbolism of Ye Zhi's poetry is concerned, his poetry creation can be divided into three parts. In the first stage, Ye Zhi created some foreign myths and legends. In the second stage, Ye Zhi began to use Irish materials from his own country to create materials. In the third stage, Ye Zhi began to create some symbols of himself through his own imagination.