Without telling people where you live, it is hard to make suggestions.
However, I do think you need to take a week off to accompany them for sightseeing. Joining tours, especially those organized by China Town travel services, would be too tiring for 70's years old, if they are not of particularly healthy and strong.
However, I do think you need to take a week off to accompany them for sightseeing. Joining tours, especially those organized by China Town travel services, would be too tiring for 70's years old, if they are not of particularly healthy and strong.