Abstract: The “Bai style”,represented by Bai Juyi,originally refers to the poetic style of “nature” and “simplicity”.Its evolution in the Northern Song Dynasty (960—1127) is closely related to the psychology of the times,the consciousness of the subject and the strength of personality.Zhang Lei,with the spirit of Confucianism and Buddhism,reconstructed the poetic style of “Bai style”,based on the thought of Taoism.Its leisure connotationwas transformed from the failure of pursuing “external kings” in the party struggle into the mental compensation of “internal saints”.After Zhang Lei’s imitation of “ Bai style”,the Song people began to learn it,putting the vision of Confucian world into the “leisure” category of the “Bai style”.In the Song Dynasty when party conflicts frequently occurred,Zhang’s imitation of “Bai style” has provided a habitat of mind,besides Tao Yuanming，for the literati who still had no remorse even though they were banished from the court.

Key words: “Bai style ”, ZHANG Lei, leisure, evolution, BAI Juyi