I don't have enough information to provide a direct answer to your question. However, I can suggest some possible ways to create an advice background with a vector design in high definition (HD).

One approach is to use a tool like Adobe Illustrator or Inkscape to create the vector design. You can then export it as a high-resolution image and use it as a background in your application.

Another option is to use a library like SVG.js or Paper.js to create the vector design programmatically. This can be useful if you need to generate multiple versions of the same design or if you want to create interactive elements.

If you're looking for a more specific solution, could you please provide more context or clarify what type of application you're building and what programming language you're using?