Bad Sweetheart发起于2019年末，曾为贺铭洋和肖宇（基于伦敦与武汉移动终端）的双人互联网计划，鼓手李烦加入后为三人阵容。仅叙述十八到二十五岁之间的不成熟烦恼。 　　吉他/采样/合成器/人声：贺铭洋 　　吉他/人声：肖宇 　　鼓：李烦 　　Bad Sweetheart was the collaborative pop project founded in 2019 of Mingyang He and Yu Xiao (based in London and Wuhan respectively), and the addition of drummer Fan Li has made the band become a stable trio. The troubles of immaturity between the ages of 18 and 25 are what they try to sketch. 　　Guitar/Sampler/Synthesizer/Vocal: Mingyang He 　　Guitar/Vocal: Yu Xiao 　　Drum: Fan Li