In fact, the reason for continuing to write "Dragon" is because everyone feels reluctant to let go, especially the story of Lu Mingfei and the others. The original work has an ending, but many details have not been explained clearly. For example, what happened to Nono, should there be an answer to Lu Mingze's matter, and what will happen to Lu Mingfei in the end? These can make people think about them for a long time and feel that they are not enough.
The most touching thing about "Dragon" is actually the pain of growth, destiny and youth it talks about. Those characters are not only heroes fighting monsters, they are also experiencing some human struggles and facing some life problems. Even though the original work is over, many people still want to know whether people like Lu Mingfei can continue on, whether they can face the future, and whether they can have a new beginning.
More importantly, the relationships and emotions between these characters are so real, with both the warmth of friendship and the complexity of love. It feels like there is more room for exploration in each person's story. Just like those complex emotions in our own lives, who says youth can only have a simple ending? The purpose of the continuation is to show these complex emotions again, so that everyone can see how these characters face their own choices and how to take the next step.
In general, the purpose of the continuation is not to let these people disappear just like that, but to give them more stories and let everyone see some of themselves in them.