I often go to Gannan for botanical research, but do not understand the local dialect, according to the phonetic translation of "Shan Lai", I think it is not Shanai ah? The main aromatic components are naphtha, p-methoxy cinnamon, cinnamic acid ethyl ester, camphene, carene - 3, p-methyl thujaplicin, kaempferol (Kaempferol), kaempferin (Kaempferide) and other components.

I speculate by the leaf characteristics, because you say more like the yellow flower grass, I estimate that it is the yellow cauliflower,

The yellow cauliflower is the lily family, the mountain naiad is the ginger family, are monocotyledonous plants, the leaves are elongated in stripes or bands, the appearance is indeed very similar; link to the picture you look at.

The yellow cauliflower: /myBlogDetail.htx&id=325746&userid=930404