Why are there western cellos in folk music bands?

Cello is a kind of western musical instrument, and it is one of the common and indispensable instruments in orchestras and symphony orchestras. Cello is good at expressing beautiful melody characteristics with singing characteristics. In the band, the bass part is the main conductor, with beautiful timbre and wide range, which can not only show the deep and determined wind, but also show the beauty of quietness, implication and gentleness, and is deeply loved by people. Why are there western cellos in folk music bands?

First of all, China folk music is not suitable for ensemble in the form of large groups, because they did not have a complete system when they were invented, and the phenomenon of overlapping ranges is very serious. So far, folk music groups are only "ensemble" rather than ensemble. There is no bass instrument in folk music instruments, so in order to adapt to the orchestra performance, we can only make up for it with bass cello. But now we have a bass instrument that imitates the double bass and looks like a bigger Ruan. Now there is basically no double bass in formal folk music performances.