Can someone tell me what is the difference between community bank and trust and saving bank?

ok ,i will tell u something ahout them.
there are community bank and trust and saving bank which are named comercial bank in some countries.But there isn't real community bank in china. In fect,trust and saving bank is a bank which is accept saving only. They get money,then community bank use these money to invest.The most important difference between them is their work.
that is my view,good luck!

They are difference companies, that's all.