In some places you will be kept strictly on Airway Centerline, no matter how BIG that CB in front of you might be
- lots of military activity around!
Forget about direct routings, you will find yourself doing 90 right and shortly 90 left turn overhead PEK
Some ACC will tell you to fly 1, 2, or 3NM right of Centerline (to avoid TCAS on crossing traffic).
Fly your metric RVSM level based on your feet altimeter, with the help of a conversion table, since on Airbus or Boeing, the corresponding metric setting might be slightly off. You will find that in your NOTAMs.
Neehow= good day
cheche= thank you