Trình bày rõ ràng về ranh giới trong công việc. Trình bày khoảng cách bạn mong muốn. Chú ý đến ngôn ngữ cơ thể của chính mình. Nói về sự khác biệt. Chấm dứt tình trạng “chơi xấu”. Biết rõ khi nào là quá đủ.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Take the first chance you have to honestly address the situation at your workplace and the role the past relationship plays in it. Initiate the conversation away from curious co-workers, and preferably outside of the workplace entirely. Let your ex know that you intend to keep drama from the past outside of work. Be sure to put your best foot forward, and mention that having a cordial working relationship is important for both your jobs and your happiness. If you make strong efforts to be civil