言归正传

言歸正傳
yánguīzhèngzhuàn
  1. to return to the topic (idiom)
  2. to get back to the main point

CEDICT

to return to the main topic; to go back to business, to finish a digression and get back to the main subject (cf. "retournons à nos moutons")

Wiktionary

停止回归本题

重編國語辭典

Entry Composition