Review the writing background and author introduction of Jiangnan and Guazhou.

The author of Memorizing Jiangnan is Bai Juyi, a poet in the Tang Dynasty.

Writing background of Memorizing Jiangnan: Bai Juyi once served as the secretariat of Hangzhou, stayed in Hangzhou for two years, and later served as the secretariat of Suzhou for more than a year. When he was young, he roamed the south of the Yangtze River and lived in Suzhou and Hangzhou. He knew Jiangnan like the back of his hand, so he was deeply impressed. When he returned to Luoyang for more than ten years after retiring from Suzhou, he wrote these three "Memories of Jiangnan".

Bai Juyi (772-846): Lotte, Xiangshan layman, Mr. Zuiyin. He was a great realistic poet in the Tang Dynasty and one of the three great poets in the Tang Dynasty. Bai Juyi and Yuan Zhen * * * advocated the new Yuefu movement, and together with Liu Yuxi, they called the world "Bai Yuan" and "Bai Liu". Bai Juyi's poems have a wide range of themes, diverse forms and simple and popular language, and are known as "the poet's magic" and "the king of poets".

The author of Dengguazhou is Wang Anshi in the Northern Song Dynasty.

Writing background of Dengguazhou: In the fourth year of Song Dynasty (1037), Wang Anshi settled in Jiangning (now Nanjing, Jiangsu) with his father Wang Yi. Wang Anshi grew up here and had deep feelings for Zhongshan. In the second year of Zong Shenxi Ning (1069), Wang Anshi was appointed as the Deputy Prime Minister. The following year, he was appointed as Zhang Shi (Prime Minister) of Tongping and began to carry out political reform. He was forced to resign as prime minister several times because of the attack of opposition forces. This poem was written in February of the eighth year of Xining (1075), and Wang Anshi visited Beijing for the second time.

Wang Anshi (102 1 year-1086), a character festival, was a famous thinker, politician, writer and reformer in the Northern Song Dynasty. Wang Anshi has made outstanding achievements in literature. His prose is clear, logical and persuasive, which gives full play to the practical functions of ancient Chinese prose. The article is concise, short and pithy, and ranks among the "eight masters in Tang and Song Dynasties".