Didn't see this post till now. Might not be relevent anymore. Anyways:

Funny enough, my mom and my older brother kinda just went to China without any like phone wipes or anything¹, they're not even concerned at all. Naturalized Citizens, originally born in China.

(¹not that I suggest you do the same)

I'll post an update in about like 2 weeks (like around 20 of May)

I heard my aunts in the US, also Naturalized Citizens, also just go on bussiness as usual...

I probably would not wanna leave if on Green Card, unless you wanna like leave permanently. Either that or stay till you get citizensip, that's my advice for non-citizens.

I have not heard a widespread detainment issue... a lot of ethnic Chinese in my parents social circle apparantly cross the border just fine... some on Green Cards...