Traditional fingering of erhu 26 strings

I don't need a diagram, just tell you, 15 chord: the empty chord of the inner chord is 1, which means 2, the second finger is 3, the third finger is 4, and the fourth finger is 5, just a little (3.4 means half finger).

Two handles: one refers to 4, and so on. The outer string is an empty string 5, with one finger 6, two fingers 7, three fingers 1, four fingers 2, and (7. 1) half fingers.