Chen Jianxin is from the China Calligraphy Association. He volunteered to teach at the 1st Chinese Calligraphy Training Class in Hanoi, Vietnam on December 4, 2013. He introduced the history of Chinese calligraphy and the skills used in choosing brushes to calligraphy lovers in Vietnam. Chen gave calligraphy training classes in both Hanoi and tỉnh Vĩnh Phúc to more than 90 students.