On the written years and the questions related to them in The Book of Songs Ernan

Fifteen Guofengs in The Book of Songs have two parts of Zhounan and Shaonan, and they are called 揈rnan? Because there are many discussions about Ernan抯 written years, a lot of questions related to them are very obscure. In fact, Ernan was named after their own states that Zhougong and Shaogong ruled separately from Shanxi, and many poems were handed down that were adopted in it. Not all poems in it but mort of the poems were in the times of that Zhougong and Shaogong ruled their states separately or the years later. The poems were in the states of Zhounan and of Shaonan, so they were adopted separately in Zhounan and Shaonan.