I'm not sure. You'd have to look at the author's notes or research about the story to find out if 'Butterfly' is based on actual events or just the imagination of the writer.
The Mandarin Duck and Butterfly Version of Legend was a very popular online game. It was based on an ancient Chinese legend and told the story of love. Players could play the roles of a male mandarin duck and a female butterfly. They had different skills and could team up in the game to explore various mysterious places, complete various missions, and experience various adventures. There were plenty of dungeons and equipment drops in the game, as well as automatic combat mode, allowing players to level up easily. In addition, the game also added a master-disciple system and a sworn brother system to enhance social gameplay. All in all, the Mandarin Duck and Butterfly version of Legend of Mir 2 was a mobile game with exquisite graphics and rich gameplay. It was suitable for players who liked adventure and teamwork.
Hard to say. It could be a blend of real-life incidents and fictional imagination. The author might have taken some real elements and woven them into a fictional narrative.