 Wang argues that a few of the correspondences between his reconstructed Proto-Bai and Old Chinese cannot be explained by the Old Chinese forms, and that Chinese and Bai therefore form a Sino-Bai group.However, Gong suggests that at least some of these cases can be accounted for by refining the Proto-Bai reconstruction to take account of complementary distribution within Bai.Starostin and Zhengzhang Shangfang have separately argued that the oldest Chinese layer accounts for all but an insignificant residue of Bai vocabulary, and that Bai is therefore an early branching from Chinese.