What does Doraemon: The Legend of Ursa Major and Hulk express?

This film takes place on a planet where plants live-the green planet, and the earth where people live. The biography of Nobita and Hulk originally claimed that it would be the first original non-copy work dubbed by Mizuta Wasabi, but I don't know if this definition is different. Generally speaking, the story is the short story "Sen きてぃるるさらばキー" included in the 26th volume of Ladybug (Chinese literal translation: forever). Compared with the independent publication of Nobita's fantasy adventure-The Magician of Seven, this biography of Nobita and Hulk will be published in the name of Doraemon 28th edition. As for why the character was named "Fang Fang" Tree Child (also known as Mu Mu)? It may be because the name sounds similar to the Japanese "hope" sound.

Slogan: Our hope will change the future.