The best source of information is usually service manual, so:
Google -> “lenovo yoga 310 11 service manual” -> in my case first link:
https://usermanual.wiki/Lenovo/Yoga31011IapHmm201609.643576809.pdf
-> there’s nothing about RAM replacement => sorry, it’s impossible
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solved Is it possible to upgrade the RAM of Lenovo yoga 310-11|ap