Don't ask P (education, age, health, income, business secrets, etc. ) In business communication. Why?

In business communication, it is the embodiment of personal quality not to ask other people's education, age, health, income, business secrets and other personal privacy issues, so as not to hurt each other or give them an uncomfortable feeling. Personal privacy is generally an area that others don't want to involve, so you need to ask five questions to reflect personal cultivation.