What is software outsourcing? What is the difference between software outsourcing and development? How much technology is needed? How to make money by outsourcing?

Software outsourcing means that the software company gives the modules that it doesn't want to do to other outsourcing companies for development, and only provides the functional specifications of the software requirements, and the final acceptance is OK. For example, it is too expensive for Japan to do software testing in its own country, so it is left to China, because China is cheaper. If it is development, software companies or individuals will code the test modules themselves. If you want to make money by outsourcing, you can take on other people's projects if you have a development team. Or you can get the project based on the relationship, and then outsource it to other companies, and take the intermediate expenses yourself.