There are two kinds of tuning for erhu when it accompanies Henan Henan Opera. One is that the inner chord is C and the outer chord is G. This method of tuning strings is three strings when playing Henan Opera in E-flat key, two strings when playing Henan Opera in F-flat key and six strings when playing Henan Opera in B-flat key. Another method of setting the chord is that the inner chord is set to drop B and the outer chord is set to F.

For example, in Peking Opera, Xipiding LA, Mi (6-3), Erhuangding SOI, RE (5-2), Anti-Erhuangding DO, SOI (1-5).

The mode style and melody mood of these three tones are inseparable from the tuning. Even some local operas, such as Yue Opera, are named after their basic tune in a certain way, such as the tune of the ruler and the tune of the four workers.

Extended information:

The five commonly used tuning chords are 1, 5, 5, 2, 6, 3, 3, 7 and 2, 6. Among them, 15 and 52 kinds of tuning are usually called basic tuning, which belong to the pressing method and are widely used.

the other three kinds of tuning are chord-cutting methods. The original phoneme refers to the first phoneme, including two empty strings, that can be controlled by four fingers after the left hand holds the piano bar a little below the golden bell.