nobody can help me?

Hi Anakin, Welcome to EasyEDA. Unfortunately, you have had no replies because I suspect there are no mind readers on this forum. In your first post all you have done is make two statements and posted an image. `I am designing a PCB to connect my Arduino nano on it and the different modules` What Arduino nano version/ What signals? What Modules? To perform what function? `I don't know if I choose the correct component in my project.` Neither does anyone else because if you ask for help you need to give people information about exactly what help you are asking for. To do that you must at least: 1. Explain your application. What are you trying to do/design/make/build. 2. Provide a link of some sort to your schematic/PCB/Project and any other information relevant to your project; 3. Make it quite clear what the issue is that you need help with; 4. Say what you have done to help yourself before posting here (Google/Wiki/other sources of information you have used to try to find the information you are asking for).