What are the "significant contributions" of the Chinese during the Tan

Question: What are the "significant contributions" of the Chinese during the Tang Dynasty!?

I need this for a report for our Asian studies class!.

And please provide more information and details about the invention or contribution, 2 to 5 sentences will be enough!.Www@QuestionHome@Com

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Beyond medicine, the Chinese of the Tang period employed complex chemical formulas for an array of different purposes, often found through experiments of Daoist alchemy!. These included a waterproof and dust-repelling cream or varnish for clothes and weapons, fireproof cement for glass and porcelain wares, a waterproof cream applied to silk clothes of underwater divers, a cream designated for polishing bronze mirrors, and many other useful formulas!.Www@QuestionHome@Com

they made that orange drankWww@QuestionHome@Com