The new version of Wu Song’s background music is called "Covenant of the Four Seas". According to the query relevant information. The new version of "Water Margin" has a total length of 86 episodes. The four theme songs have been carefully arranged, and the tones are all consistent with the storyline: the opening and ending songs of episodes 1 to 48 are "Countless Brothers" sung by Jinggangshan and sung by the stars of Water Margin, and "Countless Brothers" sung by Coco Lee. "Covenant of the Four Seas" reflects the heroic and heroic spirit of the heroes of the Water Margin when they appear on the stage; episodes 48 to 86 respectively use another version of "Covenant of the Four Seas" sung by Mao Amin and completely different from Min Li's version. ", and "Since You Left" sung by Chu Rui. The song is sad and solemn, hinting at the tragic ending of Liangshan hero Zheng Fangla who suffered heavy casualties; the ending theme of episode 86, the finale, changed back to Jinggangshan lead singer, Zhang Haoxiang, Liu Guanlin, etc. "Countless Brothers" sung by people echoes the beginning.