Ch'in-shih-huang, the first Emperor of China, witnessed many regional differences in language, writing, and transportation resulting from the different states from which they came, so he took to the task of creating a unified system for the country. For example, he promulgated the official production of measures and weights as well as bronze vessels, creating a single system. He also forbid the writing of the Six States, using the "Ts'ang-chieh" as the standard for Ch'in writing. Ch'in officials also became teachers in Ch'in writing.