Pretend to remember the Jiangnan background easily

Bai Juyi once worked as a secretariat of Hangzhou, stayed in Hangzhou for two years, and later worked as a 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. It should be said that he knows a lot about Jiangnan, so he was deeply impressed. Twelve years after he returned to Luoyang from Suzhou, he wrote these three poems recalling Jiangnan at the age of 67, which shows that the scenery of Jiangnan is still vivid in his mind.