1. Introversion and Independence: These individuals tend to maintain introversion and enjoy solitude, and may have a strong sense of personal space and privacy. They tend to solve problems on their own and do not easily confide in others because independently solving problems is a sense of achievement and a way of self-protection for them.
2. Strong emotional control: They usually have good control over their own emotions and will not easily display fragile or deep emotions in front of others. This control ability may be the result of long-term self training, or it may stem from vigilance towards potential harm and disappointment in interpersonal relationships.
3. Selective intimate relationships: Although they may not easily confide in others, once they establish deep trust, they will be very loyal and devoted to specific people. These few accepted friends or partners usually go through a long period of understanding and testing before they can reveal their true selves and share their innermost thoughts and feelings in front of these people.