Ugh, don't you hate when you find the answer to your question right after asking it.
numerical notation system
Also known as Ziffersystem, meaning “number system.”
I don't think there is such thing as having to learn an instrument before you can learn another. Of course, if you had experience in similar instruments it would be helpful, but since you don't have, there is no point in "torturing" yourself learning an instrument that you have no interest on.
IMO one of the key aspects of learning new instruments is ...
Vibrato was and is known as two different techniques: Rou Xian and Yaxian. The below excerpt from Samuel Wong's erhu research explains the two techniques:
揉弦 Rou Xian (Vibrato)
Vibratos can be effected by:
i. Using finger pressure to suppress the string, increasing and decreasing its tension. This technique is also known as 压弦 yaxian and this is ...
This is "JianPu" or "numbered musical notation". Wikipedia on Jianpu mentions some software tools, but most of them seem to require knowledge of chinese (since that notation system is mostly used in china). A (quite old but free) tool is "S-Music". Simp-Erhu is another free tool, but it requires MS Word.
There's also a comparison of four free Jianpu ...
First of all the ehru is not a western instrument so I'd as are you playing western scales on it, Major etc? Or eastern scales which may be different.
The thing that is constant in western music is the steps in the scale. For the major scale starting on any note you progress by steps as follows: whole, whole, half, whole, whole, whole, half. Where the ...
as others have pointed out, JianPu choices are indeed limited. Most of them are lacking in features, or look really terrible (which can be distracting when playing). There was promise in 2011 when someone wanted to bring about JianPu support for MuseScore, but sadly it never came to reality. Hopefully in the future there'll be more widespread support for ...