chāosòng xiāngguān fùzérén, bú shì wèile shuǎiguō, ér shì ràng gāi zhīdào de rén zài tóngyī tiáo xìnxī xiàn shàng

抄送相关负责人，不是为了甩锅，而是让该知道的人在同一条信息线上。

CC'ing the relevant people is not about passing the buck, but keeping everyone who needs to know on the same page.