It is a 'Quill'.
It is a feather from a goose, which was shed during the natural annual moult.
The tip of the quill, the part attached to the bird, not the feathered end, is cut at an angle, and then given a single split.
From this the split tip is dipped in Indian or Mandarin ink , in order to write.
Since it is slow drying ink, a powder ( talc, or very fine sand ) is shaken over the writing in order to dry it out. Then blown off, or allowed to spill off.
The writing paper would be parchment, not modern paper, but a much thicker heavier form of paper.
Writing with a quill is slow, but 'trains' the hand to write much more clearly, than a modern biro.
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medagaga
Well, we will never know what they called it, but now we call them Heirogylphs or Heiroglyphics.
Technical writing is used for writing or drafting technical communication en.wikiversity.org/wiki/Technical_writing
Probably a form of Chinese writing.
their writing was called hieroglyphics and it was a form of picture writing