My brother hasn't called my sister for years, and he doesn't even send WeChat. What is his heart?

In this case, it is difficult to determine my brother's psychological state, because everyone has his own behavior and communication habits. However, there are several possible explanations:

1. Lack of interest or time: My brother may not be interested in communicating with his sister, or he may not have enough time to make a phone call and send a WeChat.

2. Contradictory feelings: The younger brother may have contradictory feelings for his sister, such as dissatisfaction or dislike, so that he does not want to contact her.

3. Personal space: My brother may want to keep his personal space and don't want to be disturbed. This doesn't necessarily mean that he doesn't care about his sister, but he wants to be alone in his own space.

4. Different communication methods: My brother and sister may like different communication methods, for example, my sister may prefer telephone or WeChat, while my brother may prefer other communication methods, such as face-to-face chat.

In a word, I can't determine my brother's specific psychological state, so I suggest my sister communicate with my brother directly to understand his thoughts and feelings, so as to better understand his behavior.