Not necessarily. Liking Ming Dynasty doesn't necessarily mean that he or she is abnormal. It depends on personal interests and cultural background. Some people may have a special interest in the Ming Dynasty, while others may learn about the history, characters, and culture of the Ming Dynasty through reading novels, historical books, or other means and develop a strong interest in it. If a friend talks about the Ming Emperor and the Ming Jinyiwei every day, it doesn't necessarily mean that he or she really became the Emperor or Jinyiwei of the Ming Dynasty. It may just be a way of expression or humor. Furthermore, to say these words, one does not necessarily need a real identity or evidence. It may just be a fantasy or imagination of his or her own. Therefore, a friend liking Ming Dynasty does not necessarily mean that he or she is abnormal. It depends on his or her specific expression and cultural background.