The forest can conserve water in the ecosystem, so it is called a "reservoir". It is also a species bank, a gene bank, a resource bank, and a money bank. This episode will lead the audience into the forest to experience this complex ecosystem formed by nature over hundreds of millions of years, and understand its irreplaceable role in regulating climate, conserving water sources, maintaining water and soil, and eliminating pollution.

• Li Sisi
• Zhang Tengyue
• Ren Luyu