'You can't write two Qin characters in one stroke'. It is an idiom from a novel I read. The characters use from time to time in some business talks. I can't figure out the meaning and Google can't figure it out too. Please, help! And if there is a resourсe that can facilitate the search in some way? Thank you very much!
You can't write two xx(surname)characters in one stroke it means whoever the people they are talking about are the descendants of the same ancestor.