One possible theme could be friendship. If Tin and Tina are two characters, their relationship might be at the core of the story, showing how they support each other.
I'm not sure specifically which 'tin and tina true story' you are referring to. There could be many stories with such names. It could be about two people named Tin and Tina who had an interesting adventure together, like maybe they went on a journey to discover a hidden treasure or something.
I'm not sure which specific 'Tin and Tina based on true story' you are referring to. There could be many stories or works with characters named Tin and Tina. It might be a local or less - known story. You could give more context like the genre of the story (is it a horror, drama, etc.) or where it's from to help me answer better.
As there is not enough information about 'cheung tin chi real story', it's hard to judge its fame. It might be a story that has made an impact in a local context, for example, in a small town or among a particular social circle, but globally or even nationally, it may not be considered famous at all.
The story of 'Rin Tin Tin and the Christmas story' might revolve around the dog's role during the Christmas season. It could start with Rin Tin Tin living in a place where everyone is preparing for Christmas. The dog might notice that there is a family or a group of people who are facing some difficulties, like not having enough food for Christmas dinner or not being able to decorate their place properly. So, Rin Tin Tin decides to help. It could find food for the family by leading them to a place where there is extra food available. And for the decoration part, it might find some lost Christmas ornaments and bring them back to the family. In the end, Rin Tin Tin becomes a hero during Christmas and spreads joy and love in the community.