Hi Cross.huang,
We're sorry that you had a bad experience with the Chat support.
Your CC membership is based in your home country so you can travel without any worries. Your access to your Creative Cloud service will not experience any interruption, plus your desktop apps will already be downloaded on your desktop for your use.
To print the invoice, please see: Print a copy of the invoice for your Adobe purchase
You may also Contact Customer Care for any other help or information.
Feel free to update the thread for any other questions.
Thanks
Kanika