上綱上線 (soeng5 gong1 soeng5 sin3) — apply serious and profound principles on something minor and simple in Cantonese
soengˏ₅上gongˉ¹綱soengˏ₅上sin˗₃線简 上纲上线
Mandarin Pinyin: shang4 gang1 shang4 xian4
Meaning of 上綱上線
nounapply serious and profound principles on something minor and simple