The items listed in your resume should have a certain length of time, which can better show your actual contribution and achievements in the project. The long project time, to a certain extent, shows that you have rich project experience, but also shows that you have the ability to continue to participate in and adhere to the project. This is especially important for some complex projects or projects that require long-term investment.

However, short project time also has its advantages, especially if you have little project experience. Short-term projects can show your flexibility and adaptability, indicating that you can quickly adapt to the new environment and learn new skills. In addition, for some fragmentary projects, it may be more appropriate to list the projects for a short time.

To sum up, the length of the items listed in your resume depends on the specific situation. If you have rich project experience, you can choose to list the projects for a long time to show your ability and experience; And if the project experience is less, you can list some projects that have a short project time but have a certain impact on your development. The most important thing is to clearly explain your role, contribution and achievements in the project, so that potential employers can have a correct understanding of your abilities.