1898 April to 18 February, war broke out between the United States and Spain. The 25th President of the United States, McGinley, urgently needs to send a top secret letter to General Garcia in the safest way with lightning speed. After recommendation, a young lieutenant named Andrew Tan took on this important task related to national affairs. He walked through a dangerous country unconditionally and gave the letter to Garcia.

This story is widely circulated all over the world, translated into almost all languages, becoming the sixth best seller in the world, with a cumulative sales volume of 800 million copies worldwide.

It represents dedication, loyalty, diligence, initiative and self-confidence, and becomes an honorary symbol of commitment and professionalism. Many armies and enterprises distributed this book to soldiers and staff in recognition.

Today, people are reading this little book with a hundred years of wisdom, which strongly shakes the long-standing monotonous heartstrings. Even the strongest stone will be moved by it.