on wikipedia if you look up "movable type" you see a big discussion of the earlier work in China and Korea before moving on to Gutenberg.
if you look up "printing press" you get the Gutenberg story only, including that Gutenberg discovered an alloy for his type that was so good it remained unchanged for hundreds of years.
conflating movable type with printing press is a big mistake for this type of analysis, and that's before getting to the out of the box simplicity of movable type for alphabets a few dozen characters long vs the vocabulary required for Chinese writing.
(I happened to look this up the other day just to get the date that mass printing started in Europe, and I started with movable type so I had already recently discovered all the above points)