Yesterday I installed the debian lenny on yeeloong 8101, the 10.1 inch notebook based on loongson 2F CPU for a friend. Then I find there is less English document describing how to do this. More here
So I write the process down to anyone who is interested in installing debian on yeloong. There are many ways to do it I choose the way of using a debian network installer. Please make sure you have a internet connection first.