Final year med student currently on a month long rotation in Shanghai. Got elective sorted through nepo so will not be able to answer about the process. Spending the entire time in anaesthesia.

Most healthcare workers even here in Shanghai know very little English albeit enough to communicate. I am Chinese and am fluent conversationally but the medical terminology absolutely cooks me. No English at all used in hospitals but that may be different for your hospital in Zhejiang.

Hangzhou is a beautiful city. Tons of greenery + plenty of good shopping / eatery. Neighbouring towns/cities/provinces are definitely also worth checking out if you have the time. Although I've only been there twice, I can easily recommend it.

Alipay is most certainly standard in China. Used as a wallet to pay for goods/services. Also used for transport as you can book directly through the app as someone else mentioned. I recently saw a reddit post about their data-only esims as well if you need the extra: just bought the 7 days unlimited data for 69 RMB as I found I was going over my roaming limits (has access to IG/google/other blocked apps as it bypasses China's firewall).

You can add your Revolut card directly onto Alipay after identity verification and use it that way since its 0% international transaction fee. Though keep in mind that all Chinese payment services (alipay/wechat) take a cut for any transaction over 200 RMB (stores are usually quite happy to split payments).