This research investigates Liang Yunjiang's contributions to the preservation and transmission of Erhu through performance, composition, education, and technological innovation. Liang Yunjiang, a renowned Erhu musician and educator, has been instrumental in increasing the instrument's popularity in China and worldwide. Through over 100 concerts in more than ten countries, he has aggressively promoted Chinese folk music internationally, enabling cultural interchange and improving the Erhu's prominence in current music. His technical advancements, notably the "gravity bowing" method, transformed the instrument's timbral expressiveness by increasing its dynamic range and tone depth. As an instructor, Liang has taught award-winning students and incorporated scientific procedures into Erhu instruction, such as biomechanics-based performance techniques and interdisciplinary approaches that combine traditional Chinese music with Western composition. His founding of the "Chinese Style Erhu Orchestra" has offered an important performance venue for students, nurturing a new generation of musicians capable of integrating tradition with contemporary.