From all rivers to the sea, how inextricably linked are the rivers to us? This episode will explore how the Dulong people on the banks of the Dulong River at the foot of Gaoligong Mountain achieved green poverty alleviation. It will also unravel the mystery of why the Jiangnan ancient towns are densely populated, and experience the unique "water" rhyme of Yinchuan, which is called "Saishang Jiangnan".