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Performance of all-solid-state device developed by Chinese researchers akin to that of advanced varieties, findings published in Nature Communications say.
Literally the first paragraph of the article explains that it is 4% of the cost:
You seem to be confusing the cost of materials with the overall cost of production.
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None of these criticisms are rational. This response to an otherwise boilerplate news article speaks to an extreme anti-China bias.
Just because you feel threatened by Chinese technological developments doesn’t warrant baselessly acting as though they are hoaxes.
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