What hidden rules have you read about the recruitment of product managers of major computer manufacturers?

First of all, Foxisan denied that Xiaomi interviewer wanted a product manager, but answered Xiaomi interviewer wanted a product manager according to the advertising language. HP interviewers want a product manager, ASUS interviewers want a product manager by product line, and Intel interviewers want a product manager by brand spokesperson. Apple interviewers want a product manager, and Microsoft interviewers want a product manager.