I would like to ask someone with experience to talk about the difference between water supply and drainage and water conservancy and hydropower projects.

It all depends on individual development. If you work in a sewage treatment plant or a water treatment plant, it is stable and it is a state-owned enterprise. Some people are still willing to go.

The counterparts include design institutes, which do municipal pipeline, community, water plant design, etc. Large design institutes pay very well, and it is reasonable to say that you can't get into it. Small private design institutes are easier to get into, but relatively speaking, they definitely don’t earn as much as large ones, and they are more tiring.

There are also construction units. All construction units require water supply and drainage professionals, such as China Construction Engineering Bureau and many other branches of these units in Guangdong.

You can also go to real estate and do some design, construction, etc.

There is no absolute good or absolute bad, it all depends on personal preferences, luck, and your own efforts.

Anyway, you should study hard now, there is absolutely no harm in doing this