Can Yangjiang hukou apply for a Hong Kong visa in Guangzhou?

I don't think so. For the first time, you usually have to go back to the place where your account is registered. After the second time, you can go to the "Guangdong Entry-Exit" website to apply for EMS online. There is a prompt asking whether you want EMS. After you choose, you should fill in the detailed address, so that someone will pick it up at home, which can be done in a week. I have many friends from other cities and provinces who do this. I hope I can help you.