1. Title: If the leadership position is clear, you can directly use the title, such as "Dear General Manager" and "Dear Chairman".
2. Address: If you are close to the leader, you can directly use the name of the leader, such as "Dear Teacher Zhang" and "Dear Ms. Li".
3. Company Address: If you invite company-level activities, you can use the company name as the address, such as "Dear Your Company" and "Dear All Staff".
Using proper address in the invitation can express your respect and sincere invitation to the leader.