"I am captivated by the sounds of the musical instrument. It's amazing that one string can produce such a wide range of melodies, isn't it?" says the 50-year-old, adding that duxianqin is an indispensable part of life for the Jing people, who largely live in coastal areas and earn a living by fishing.

"People play the musical instrument as a daily entertainment and on special occasions, such as traditional festivals, weddings and family reunions," she adds.

Su's father, Su Weiguang, was a singer, poet and writer, who was keen on collecting items pertaining to, and doing research about, the culture of the Jing ethnic group. He not only translated old folk songs from the Jing language into Mandarin, but also wrote lots of folk songs himself. Su Haizhen's mother, Ruan Chengzhen, was a dancer, who specialized in performing folk dances of the Jing ethnic group.

As children, both Su Haizhen and her elder sister, Su Haiying, learned to perform folk songs with their parents. In 1987, Su Haizhen studied at the Art School of Guangxi, majoring in duxianqin performance. In 1994, she traveled to Beijing to study at Minzu University of China, where she majored in vocal performance.

"Duxianqin is a minority art, with very few people playing it. Back then, there was nobody who could teach the musical instrument at the university," says Su Haizhen. "I want to popularize the musical instrument, which is crucial for both the Jing people and their culture."

As a member of the 14th National Committee of the Chinese People's Political Consultative Conference, Su Haizhen has another important mission besides preserving and promoting duxianqin.

Dongxing is a border town adjoining Vietnam. Su Haizhen is also devoted to deepening the friendship and ties between China and its neighbor through duxianqin, since the musical instrument is also played in Vietnam.

In 2005, she traveled to Vietnam and studied the musical instrument with established duxianqin players there.

"It was a memorable experience because the teachers were very strict and many songs were new to me. I spent about seven hours a day practicing," recalls Su Haizhen.

That year, Su Haizhen recorded and released an album, titled Hai Yun Mei Ying, featuring 11 original folk songs played on duxianqin, which was the first album in the country dedicated to the musical instrument. In 2007, she released her second album, Hai Shi Shen Lou.

Since 2012, Su Haizhen has been teaching young Jing people to play duxianqin by working with local schools and she continues to grow appreciation for the instrument by performing on TV shows. She has also founded a duxianqin ensemble, which involves about 100 players and plays during the annual traditional hajie (singing festival), or the Changha festival for the Jing people.