"The incense burner in Rizhao produces purple smoke, and the waterfall in the distance hangs in front of Sichuan" comes from the first and second sentences of the ancient poem "Looking at Lushan Waterfall" by the poet Li Bai in the Tang Dynasty. The whole poem is as follows:
The purple mist is illuminated by sunlight, and the waterfall hangs in front of the mountain.
On the high cliff, it seems to be thousands of feet high, which makes people think that the Milky Way has fallen from heaven to earth.