What about Wuhu's travel passport and visa to Hong Kong? What process? How long will it take? What other precautions are there?

To go to Hong Kong, you need to apply for a Hong Kong and Macao Pass at the local exit-entry administration center. You don't need a passport. After the pass comes down, if it is a tour group, you can apply for an endorsement. If you apply for free at the entry-exit center, it will take about seven working days! You call the entry and exit in advance to ask what documents you need to bring!