In the key of D, the distance from the center of the 1st yard to Youyue Mountain is about 165mm, the distance from the center of the 8th yard to Youyue Mountain is about 420mm, and the center of the 21st yard is about 850mm from the Youyue Mountain. In the process of excessive bass range, the distance of the zither yard is gradually widened to form a "column of geese".

For the convenience of transposition, in the commonly used D key arrangement, the spacing between number 3 and number 4, number 8 and number 9, number 13 and number 14, and number 18 and number 19 should be about 2 times that of other piano numbers. In addition, the spacing of the bridge bridge in the bass part is larger than that of the treble bridge. Due to the limited strength of fingers, young children can move the entire row of zither yards towards Yueshan.

Of course, the distance of the zither code is not absolutely fixed. After mastering the installation of the guzheng, you can move the position of the zither code according to your own preferences, and then calibrate the timbre. The timbre takes harmony as the best standard.