Possessing the passion towards string music and fanatics in performance, Leung Kin Fung, together with Mr. M. K. Wong, founded Hong Kong Pure Strings (HKPS) in April 2004. This is a string ensemble of top string musicians from all over the world where Leung serves as the Artistic Director. HKPS gave its successful premiere concert at the Hong Kong Cultural Centre on June 13, 2005. The group is not confined to a specific style or a certain denomination. Under the leadership of Leung Kin Fung, HKPS aims at fusing classical and contemporary music and bringing extraordinary music elements to the audiences.

In April 2004, in order to encourage and strengthen the Hong Kong's Contemporary Music environment, Leung invited nine outstanding Hong Kong composers presenting a "Pure String Project". The project featured premiere on newly composed string works by renowned Hong Kong composers, Chan Wing Wah, Victor Chan, Joshua Chan, Doming Lam, Man-yee Lam, Samuel Lo, Clarence Mak, So Ting Cheong and Richard Tsang. The concert of the "Pure String Project" was successfully held at the concert hall of The Hong Kong Academy for Performing Arts and was recorded and edited into DVD. This project helped to promote musical exchange between Hong Kong musicians and composers as well as enhance the awareness of local music compositions in society.

To further convey the spirit and effort, Leung lead the project - Musicarama 2005 on the October 26, 2005. This was an international contemporary music event organized by LCSD and was helded at Hong Kong City Hall Theatre. The concert was a rendezvous between "Hong Kong Pure Strings" and compositions for the strings. Leung, together with fellow players from the ensemble, interpreted works of various nationalities and styles, showcasing the versatility and exploring the limits of familiar instruments. Besides works from the local composers, the concert was included works by international renowned composer Penderecki and renowned Chinese composer Ye Xiaogang.

In the suit of Artistic Director of "Hong Kong Pure Strings", Leung organized a joint concert with six string musicians of Berlin Philharmonic Orchestra which was held on November 15, 2005 at Sha Tin Town Hall. This was the first time in Hong Kong that a local music ensemble has a chance to perform with the musicians from the world's top orchestra on the same stage. This concert was definitely serve as a platform to encourage cultural exchange and uplift the overall music and cultural standards in Hong Kong. After that, another successful joint concert with musicians from the Hamburg Symphony Orchestra was helded in Hong Kong Cultural Center, February 19 and 20, 2006.

In 2007, The Hong Kong Pure String released its first CD "Popsinera" with great reviews. The CD was awarded "The 10 Hottest CD of year 2008" and "The Best Light Music Album of year 2008” by the Canton Radio, China.