How to make the first contact with the superior leaders you don't know?

The key is to see what you have, which is our goal. You can contact anyone who has a job. If you don't have a job, you'd better not call rashly. If it's business, a formal phone call, usually after the connection, first say XX leader (manager and other positions) hello, I'm Xiao XX, working in XXX department (what position), do you have time now? I have something to hold you up (if it's after work, it can be said that I'm calling at this time and I won't bother you). Then the other party either answers that he is free and wants to talk to you, or he is not free and asks you to call later. Then, if it is urgent, you can make an appointment directly by phone or send a text message to make an appointment. This is the official number. The main procedure is to introduce yourself first. I don't understand informal phone calls.