Guqin construction

The construction of the guqin Chinese zither is a complex process like any other musical instrument. However, there is much symbolism in the choice of materials, the shape or form of the instrument that are important things to consider when creating a qin.

According to tradition, the qin originally had five strings, representing the five elements of metal, wood, water, fire and earth. Later, in the Zhou dynasty, Zhou Wen Wang (周文王) added a sixth string to mourn his son, Bo Yihou (伯邑考). His successor, Zhou Wu Wang, added a seventh string to motivate his troops into battle with the Shang. The thirteen hui 『』 on the surface represent the 13 months of the year (the extra 13th is the 'leap month' in the lunar calendar). This is a traditional explanation, however the positions of the hui represent just intoned harmonic positions derived from the natural overtone series and form the basic system of universal consonance related to the fundamental tone. The surface board is round to represent Heaven and the bottom board flat to represent earth. The entire length of the qin (in Chinese measurements) is 3 chi, 6 cun and 5 fen (approx. 136 cm)「」; representing the 365 days of the year (though this is just a standard since qins can be shorter or longer depending on the period's measurement standard or the maker's preference). Each part of the qin has meaning, some more obvious, like "dragon pool" 『/龙池』 and "phoenix pond" 『/凤沼』.

The sound chamber of the qin is constructed with two boards of wood, typically of differing wood types. The slightly rounded top board (soundboard) is usually made of tong wood 『』, the Chinese parasol tree, or Chinese paulownia. There are many different types of tong wood, the names of which are listed in the Yuguzhai Qinpu: wutong 『桐』 (Firmiana simplex), baitong 『桐』, qingtong 『桐』 (Japanese paulownia), paotong 『桐』 (Paulownia tomentosa), yitong 『桐』 and nantong 『桐』; the best is wutong, but paotong is now widely used. The bottom board is made of zi mu 『木』 catalpa (Catalpa ovata) or, more recently, nan mu 『木』 camphor wood (Machilus nanmu) . The wood must be well seasoned, that is, the sap and moisture must be removed (of the top board wood). If sap remains then it will deaden the sound and, as the moisture evaporates, the wood will warp and crack. Some makers use old or ancient wood to construct qins because most of the sap and moisture has been removed naturally by time (old shan mu 『木』, "Chinese fir", Chinese Cunninghamia or Japanese Cryptomeria, is often used for creating modern qins). Some go to lengths to obtain extremely ancient wood, such as that from Han dynasty tomb structures or coffins. Although such wood is very dry, it is not necessarily the best since it may be infected with wood worm or be of inferior quality or type. Many modern qins made out of new tong wood (such as those made by Zeng Chengwei) can surpass the quality of antique qins. Unfortunately, the supply of good wood to make qins has dwindled in recent years, causing a rush to make more qins. Paulownia takes many years to grow and requires a curing period of at least 20 years for the sap and moisture to be properly removed. As for old wood from old houses, there are not much old houses left after modernization of the cities and towns.

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Wikipedia