Alternate plucking strings with the left and right index finger.

Alternate plucking two strings one octave apart with the thumb and middle finger with closing motions. Pluck with the thumb first on the higher-pitched string, then pluck with the middle finger on the lower-pitched string. The pattern is typically played as 16th notes. It has ties to the Chaozhou School style of music.

Kao suggests Shandong players may use the name Bā dù lún 八度轮 “Octave Round” to refer to this technique. Two other notation variants:

Dǎ yuán starting with the middle finger.Alternate plucking two strings one octave apart with the thumb and middle finger with closing motions. Pluck with the thumb first on the higher-pitched string, then pluck with the middle finger on the lower-pitched string. The pattern is typically played as 16th notes.

A category of 9 techniques Ferguson mentions where multiple fingers strike the same string in a specific rhythmic pattern. Unfortunately only 5 are names and explained. By itself, Suo yin is 3 strikes of the same string: Middle finger opening, index finger closing, index finger opening played in the rhythm of 1/16, 1/16, 1/8

3 strikes of the same string: Index finger closing, index finger opening, index finger closing played in the rhythm 1/16, 1/16, 1/8.

Part of the Suo yin category of 9 techniques Ferguson mentions where multiple fingers strike the same string in a specific rhythmic pattern.

4 strikes of the same string: Middle closing, middle opening, index closing, index opening played in the rhythm 1/8, 1/8, 1/16, 1/16.

Part of the Suo yin category of 9 techniques Ferguson mentions where multiple fingers strike the same string in a specific rhythmic pattern.

5 strikes of the same string: Index closing, middle closing, middle opening, index closing, index opening played on the same string in the rhythm 1/8, 1/8, 1/16, 1/16, 1/8.

Part of the Suo yin category of 9 techniques Ferguson mentions where multiple fingers strike the same string in a specific rhythmic pattern.

9 strikes of the same string: Index closing, index opening, middle closing, middle opening, index closing, index opening, middle opening, index closing, index opening (Mǒ, Tiāo, Gōu, Tī, Mǒ, Tiāo, Tī, Mǒ, Tiāo). The rhythm is 4 1/8th notes, 4 1/16th notes, then 1 1/8th note.

Part of the Suo yin category of 9 techniques Ferguson mentions where multiple fingers strike the same string in a specific rhythmic pattern.

Use the ring, middle, and index fingers to pluck the same string in the same spot in rapid succession, all with opening motions.

Pluck the same string with the ring finger, middle finger, index finger, and thumb in sequence.

Pluck the same string with the middle, index, and thumb in sequence.

Rapid alternation of middle, thumb, index, thumb, all in closing motions. No word on if this is on the same string or multiple strings.

A sequence of fancuo gou tuo gou: Thumb and middle finger pluck two strings with an opening motion simultaneously, then alternate with thumb, middle, and thumb in closing motions.

Described by Kwok as a modification of yaozhi played with the index finger (muzhiyao) but described as “the middle finger strokes inwards once; then the thumb strokes outwards, inwards, and outwards in succession.” Unfortunately I can’t offer more guidance on this.