2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36995With ~10fb$^{-1}$ data from Belle, the results of b to c and u decays have been represented here. Several decay modes have been studied, which include charmonium, semileptonic decay and Cabibbo-suppressed decays mode. The preliminary results and the measurements of KM matrix elements will also be presented here.4 pages,7 figures, submitted to Moriond QCD 2001High Energy Physics - Experimenttext