How about the research and development of pharmaceutical companies?

The research and development of pharmaceutical companies is a very slow process (there are many experiments to be done, and the process of application and approval is very long), and the investment is particularly large and the risk is particularly high. Of course, if it is successful, the return will be particularly large. Generally, a new drug takes almost ten years from research and development to market. At present, most of the domestic production is generic drugs. If you think you can stand loneliness and suffering, it's not bad to devote yourself to medical research and development. Stick to this road and you will live up to your choice, but then again, all roads are like this.