Baiji and finless porpoise are at the top of the Yangtze River ecological chain, which has a weak impact on the ecological chain, but their extinction will be a sign of ecological disaster in the Yangtze River, that is to say, there is no food for these animals and a place suitable for them to "work and relax" in the Yangtze River. As the saying goes, big fish eat small fish, small fish eat shrimp. If the shrimp suddenly disappears, it is conceivable that the others will not last long.

The climate along the Yangtze River is generally a flood in three to five years and a drought in three to five years, which is the result of large-scale atmospheric water circulation. Without human intervention, it will always be like this. The existence of a species with a long history like baiji illustrates this point. This is not the case now. Artificial climate intervention has been carried out for a long time, such as artificial rainfall, plastic film planting, greenhouse planting, wind power generation, hydropower generation and so on. There are also a lot of exhaust emissions from internal combustion engines and thermal power generation, which cause climate warming. There is something wrong with the atmospheric water circulation!

Generally speaking, when a species is extinct, we need to introspect and do it with a conscience that is responsible for ourselves and future generations, not for promotion and wealth; "Governing the country scientifically" is very urgent for China at present.