Are TLS connections in china mostly encrypted with AES or with SM4? What is the dominant symmetric cipher used for TLS connections in China? Is it AES, as it is in the US, or is it SM4?
I think as of June 2020, it's still AES, as SM4 isn't registered in IANA formally backed by an RFC yet, and most browsers used by netizens in China are based on Chromium (some users use FireFox, and some government websites still requires IE!).