The "eight bars" here refer to continuity, not totality (such as repetition at the climax). In a piece of music, it is likely that some melodies are exactly the same, especially in long tracks. Therefore, discontinuous identical articles will not be considered plagiarism.
But it is not absolute. It depends on whether this "suspicious" part is in harmony with the melody of this song and whether there is obvious plagiarism intention. The climax of my sky song is not obvious, and the plagiarized melody has not changed much, but the eight or more bars before the first climax are almost the same, so my sky is plagiarized. Some people upstairs think my weather is hotter. Brothers, you have no idea how popular the script is abroad. The Hall of Fame topped the bulletin board for several weeks in a row. As the theme song of movies and the music of nba, they are just not popular in China. I can tell you responsibly that the Hall of Fame can dump my sky for several blocks. Moreover, some people actually think plagiarism is okay. You people are just a sign of poor copyright awareness. China people's awareness is really low. Why didn't the original singer sue for plagiarism? Because they don't intend to develop in China at all, and even if they sue, China can directly deny it, just like a team in China was sued for cracking gta5, so don't be arrogant if they copied it!