How to write honorifics at the beginning and end of writing letters to leaders?

When writing a letter to a leader, you need to use honorific words at the beginning to show your respect and courtesy to the leader. Common honorifics are "respect", "dear" and "honorable". Finally, we need to express our blessings and thanks to the leaders with honorifics. Common honorifics include "sincerity", "salute", "best wishes" and "best wishes".

The tone should be appropriate, not only to express respect and courtesy to the leaders, but also to express the determination to care about and solve problems.