Do I have to pay a certain fee after applying for a patent?

Pay every year, and pay more every year. It is a mental illness for people to apply for a patent, but some enterprises and research institutes can get tens of millions of state funds by applying for a patent, and they can apply for money from various departments: seven or eight departments, such as science and technology bureau, agriculture department, ocean, agricultural tools and so on. For money, there are also many people who have made a fortune and have not developed anything. In the final analysis, we ordinary people really can't get a penny from the state when we study things, and we have to pay back the money; And those who have the road, what research institute to get hundreds of millions of countries, can do nothing, and then put the money; Transfer it and make a fortune.