The two-stringed erhu has a voice often compared to a human cry, so it is traditionally read as sorrow, yearning and sincere feeling. It can point to an emotion asking to be heard.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.