HEAR two masters of traditional Chinese instruments in two concerts given by the Hong Chinese Orchestra (HKCO) this week. Guqin virtuoso Li Xiangting and dongxiao master Tam Po-shek will be the soloists in 'Ancient Tunes of Qin and Xiao', to be staged at the Hong Kong Cultural Centre Concert Hall on Friday and Saturday at 8 pm. Li has done much to promote the art of the guqin. He has written articles about the instrument, composed guqin music and made recordings. Tam is a distinguished dizi and dongxiao player as well as a xiao maker. Under the baton of guest conductor Wang Huiran, the two soloists will perform a guqin and dongxiao duet, The Moon over Guan Shan , with the HKCO. The popular work reflects the feelings of homesickness among ancient warriors stationed at the frontier. Both the guqin and the xiao are the gems of China's musical heritage. The guqin is a perfect match for the xiao, and some guqin-xiao duets date back to ancient times. Two other works displaying the distinctive sounds of these two instruments will be Tam's own work, Theatrical Dream , and a traditional piece, Guangling Episode. Also on the programme is the traditional piece King Qin Smashing the Battle-line, featuring percussion soloist Chin Kwok-wai, who is a regular member of the orchestra. The HKCO will also play two works by the conductor, Wang Huiran's Yellow River Capriccio , and the premiere of The Soul of Dai. Both pieces evoke the splendour of Chinese landscapes. Tickets ranging from $50 to $100 are available at all Urbtix outlets (half-price for senior citizens, the disabled and full-time students). For reservations, call 2734 9009.