1. Telephone consultation: Find the contact information of naval museum, Qingdao, and call to ask if there are other ways to make an appointment or whether you can visit directly.
2. Waiting for a visit: If the reserved places are full, you can also consider going directly to the museum to see if you can wait in line for a visit. Sometimes people will cancel their appointments or leave early, and there will be a certain chance of being admitted.
3. Consider other time periods: If you have to visit on a specific date, you may need to adjust your plan and choose other less busy time periods. Such as weekdays, non-holidays and non-tourist peak seasons.
4. Consider travel agencies or tour guide services: Some travel agencies or tour guide services will provide group reservations and services including tickets. You can consult the local travel agency or tour guide service to see if there are relevant arrangements and booking options.