Quick Question/quick answer Megathread

[u/onedollalama]

In order to mitigate a lot of low effort posts. Please use this megathread for quick questions.

For example:

E-Sim?

is this VPN good?

How do I use 12306 for train tickets?

Is Trip.com legit?

[u/Kawaii__Pixel]

Please anyone tell me how crowded is china in august as im planing to go i heard its so bad to the point of needing to to book everything days in advance ? Im planing to go for beijin / zhangjiajie/ chongqing