刘浩龙 (师兄)、徐智勇 (小肥) 二人组成新组合《肥龙过江》，《砒霜之后》是他们第一首合唱歌，亦是网剧《把砒霜留给自己》的主题曲。歌曲用了日本明治时代演歌的元素，因此旋律和歌曲气氛都会有种复古感，有阵阵演歌独特的韵味，加上小肥和师兄细腻和豪迈的演绎，希望可以带出男人间惺惺相惜，把酒当歌，潇洒看人生的情怀。


All keys and programming by: 赖映彤
Guitars by: Brian Chan
Bass by: Timothy Chan
Drums by: Lawrence Tsui @ Gig Studio
Vocal recorded by: Kim @ Zoo
String Quartet recorded by: Bryan
1st Violin - Cyrus Yu
2nd Violin - Danny Cheng
Viola - Penny Yau
Cello - Cherry Leung
Mixing and Mastering by: Kai