Which finger is used to sweep the guitar strings up and down respectively?

The six lines in the figure below represent the six strings of the guitar, and from top to bottom are 123456 strings.

On the left is the direction of the piano head, and on the right is the direction of the piano tail; The vertical arrow is drawn on the string, indicating the string encountered when sweeping the string.

The former goes down and the latter goes up. The vertical arrow of the curve is the sign of arpeggio, indicating the dial-out sequence.

(1) Sweep down the 1, 2, 3 strings with your index finger;

(2) Sweep the fourth, fifth and sixth strings with your thumb;

(3) Sweep the L, 2 and 3 strings upward with the middle finger;

(4) Sweep the fourth, fifth and sixth strings with your index finger;

(5) Sweep the six strings with your thumb;

(6) Sweep up six strings with your middle finger.

String sweeping refers to a kind of guitar technique which uses a pick or fingers (some people use their nails) to pluck several strings at a time in order to achieve special playing effects. This technique plays an important role in folk guitar, but it is not easy to sweep it well. The most important thing in strumming is to be crisp. You can only pronounce one sound per sweep, which is nice.