The online supplementary information is not mandatory (of course, I was told to try to avoid omission), just for the convenience of receipt collection. If you miss the information supplement and confirm the payment by phone, you can consult the invoice information after ten working days.
Ten working days have arrived. Call again to check the ticket collection code. After you get it, enter 7 in the official WeChat account of China National Intellectual Property Administration Customer Service Center, enter the invoice collection service system, and enter the ticket collection code to print.