How about software development outsourcing?

Software outsourcing means that the software company hands over the modules it doesn't want to do to other outsourcing companies for development, only provides the functional specifications of the software requirements, and finally passes the acceptance.

For example, it is too expensive for Japanese to do software testing in their own country, so leave it to China, because people in China are cheap.

If it is development, software companies or individuals will code test modules themselves, and so on.

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.