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O-type people speak simple and clear, but the only drawback is that they like to speak principles and educate others, but they don’t want to listen to others’ education.

O-type people have a simple and one-sided idea. They think they like and feel good, and the other person will think so too. Therefore, their enthusiasm can sometimes inevitably give people a feeling of imposing on others. When encountering this situation, you should clearly show them your hobbies and hopes, and they won't mind as much as you think. ( Blood type and personality http:///xx/)

If you have a quarrel with the O-type person, don't worry about it afterwards. Don't take too long, let go naturally. However, it is difficult for them to make concessions on the spot.