This truth is very simple, just like two men fighting, but neither man will hit a woman. This metaphor should be easy to understand. Although Xiaomi is very high-profile and Huawei is very low-key, the selling points of their two brands are technology. The appearance of the two brands of mobile phones is very common, both are relatively square, which can be said to be a bit rough. Xiaomi has been interested in his own technical content and its innovation since the beginning of research and development. Moreover, the consumers targeted by Xiaomi are fashionable young people. Many people who use Xiaomi are attracted by some of its technologies, and some copy Apple's route.
Huawei also promotes its own technology. Huawei brings joy to people at every press conference, and there are often eye-catching inventions. Moreover, although Huawei is low-key, it is not as good as others' excellent technology and conscience. Therefore, Huawei is the largest seller of domestic mobile phones abroad. In China, more and more people are attracted by Huawei. The key point is that this part of consumers who are attracted is the consumer group that Xiaomi mainly targets. Do you think Xiaomi can't hack such a strong enemy? The key Lei Jun is so conceited and high-profile, it is estimated that it is difficult to tolerate his inferiority complex, so black Huawei can also be expected.
As for OPPO and VIVO, it is similar. The consumer groups targeted are all women, who are indifferent to technology and pay more attention to the appearance of mobile phones. In other words, there is no competitive relationship with Xiaomi. Since Xiaomi is not a competitor, Xiaomi is full and has nothing to do with more money. Why hack them?
This is my analysis. I don't know if you agree.