According to Worlds of Music, the solos for the erhu and the piano that are included for this chapter on Chinese music illustrate what common trend in twentieth-century nonWestern countries?

What will be an ideal response?

• This music is sometimes called "national music" (guoyue), "a style like so many in the [nonWestern] twentieth-century world . . . that drew on aspects of Western means while attempting to preserve and develop national musical content as an alternative to Western music."