It is true that you can get some subsidies for donating manure, but the amount of subsidies will vary according to different regions and requirements, not always in 300 yuan. Generally speaking, the highest amount of dung donation subsidy is in Shanghai, and it can reach 500 yuan every time. In other regions, the subsidy amount may be slightly lower. However, the amount of subsidy is only an incentive measure. More importantly, participating in fecal donation can bring positive contributions to medical research and clinical treatment, not only benefiting patients, but also bringing better health protection to the public. So, I hope you can support this public welfare undertaking.