An expensive but functional option is to enable roaming on a foreign eSIM. Getting an eSIM is relatively easy. Roaming mobile traffic is routed from the country in which the SIM is from, not the country that you're in, meaning that an eSIM from e.g. an American carrier will not be subject to the censorship in your country.
I've used this on multiple trips to China over the past decade (including a trip last year). You can find carriers that will charge very low (or even no) roaming rates.
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