Three parts. "Recalling the South of the Yangtze River" was originally the title of a Tang Jiaofang song, but was later used as the title of a ci brand. It is a poem written by Bai Juyi and consists of three parts. The lyrics and tune of "Recalling Jiangnan" have been very popular since the time it was created. In the process of being sung, appreciated and accepted by people, it has been spread to later generations and has produced various aliases. At the same time, in the long history, the tone of this word is also constantly developing and changing.