Abstract: This article recounts the many memorable moments the author experienced over more than two decades as a student and an assistant to his revered mentor—Academician TANG Au-chin, a towering figure in Chinese Chemistry Science, a distinguished educator, and an excellent leader in the advancement of scientific research and education. Through true personal recollections, the narrative offers a heartfelt portrayal of Professor Tang’s extraordinary legacy—as a titan of chemistry, a masterful cultivator of talent, and a founding architect of the National Natural Science Foundation of China. It also gives voice to the author’s deep and abiding remembrance, expressing a student’s profound gratitude and eternal reverence for a mentor, whose guidance, wisdom and virtue remain unforgettable. This tribute is dedicated with the utmost respect to commemorate the 110th anniversary of Professor Tang’s birth, and the everlasting spiritual legacy of a great teacher.