The focuses of this discussion are (1)lexicon unit and the requisites for construction of lexeme, (2) word-formation process of agglutinative language, (3) grammaticalization and fossilization at the lexicon unit. We discussed at first lexicon framework and lexeme as basic element at CG, in order to clarify the relation between the notion of grammaticalization and actual
diachronic change. The practical frame of lexeme is suggested as in F1 and F2, and two levels of word formation are suggested for agglutinative language. At last we discussed diachronic change, which is, in fact, performed through diffusion, and also discussed the necessity of the notion of
affinity concerning grammaticalization and fossilization.