Shang were written on silk, bamboo, bronze, stone, and bones.

Shang pictographs were written on silk, bamboo, bronze, stone, and bones.

Explanation:

A pictograph is a pre-historic art form that uses an image, sign, or symbol as a representation of language. This form of using such images and signs as a language form is mostly used by the people of the past where there are no specific writing styles or language forms.

The Shang dynasty of China used a similar form or system of writing to that of the hieroglyphs as used by the Egyptians. This writing was also the most important contribution of the Shang dynasty. The pictographs were drawn on silk, bamboo, bones, stones, and even bronze.

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