负书出图,履一戴九;欲耸其肩,必昂其首,爰比兴于挑打,信昔贤之不苟。
The other most commonly used right hand technique is index finger playing outward, called "tiao". According to 太古遗音琴谱 (AC1511) it resembles the turtle spirit emerging from the Luo River.
The above is a piece of Chinese poetry describing the imagery of this technique: bearing the venation diagram of the universe on its back, the turtle spirit treads the earth and supports the heavens; to be protected by its shell, it must have its head raised: to become impervious to outside forces, one needs to first be impenetrable in character, this is imitated by the motions of tiao and da, a reminder of the conscientious actions that makes a saint.
The technique is performed with the thumb supporting the index finger to rotate its second joint. The entire right hand need to appear as if holding an invisible ball, with the index finger always maintaining a natural curve, together with the thumb tracing a complete circle. Before the technique starts, the circle is more round in shape resembling a dragon's eye, whereas after the technique is finished, the circle is more oval in shape resembling a phoenix's eye. The motion of the index finger pushing ahead with the thumb is like a turtle lifting its head from water.
There is freedom in the angle at which the index nail can strike the string, to produce different texture of sound as desired. However the foundational form is played with index finger aligned vertically, striking the string from a distance of about 1cm, at an angle of 45 degrees downwards. By making sure only the tip of the nail strikes the string resolutely, the sound produced will be clear and crisp. Tiao is complimentary to gou in every aspect: tiao is outward, gou is inward; tiao uses two fingers to produce one sound, gou uses one finger to produce two sound; tiao's hand shape is like the roundness of the sun, gou's resembles the crescent moon; tiao travels from empty space to empty space from start to finish, gou travels from resting on the played string to resting on the next string. It is no wonder that gou and tiao are usually played in pairs together, and are often found at the end of musical sentences to generate a feeling of completeness.