When is the farewell place and season of Li Bai's ancient poem Farewell to Friends?

The location is now Nanyang, Henan, because the first poem named this address with a blue gable and a white water curve in the east of the city;

Qingshan is the Dushan in the north of Nanyang, Baishui is the Baihe, and the Baihe in the east of Nanyang. Now the South-to-North Water Transfer Project has the contribution of Baihe. As for the time, I really don't know. It's just a green hill. You can be sure it's not winter and spring, but summer and autumn.