Please fill this form when you registered. After you paid the registration fees, we will send you the hardcopy of Invoice by SF Express or Email  to you within 1 month and will send you the email for acknowledgement. (如需中国税务发票，请使用中文填写此表。填完表后我们会在1个月内通过顺丰快递邮寄纸质发票或通过电子邮件发送电子发票给作者并在1周内通过Email发送确认汇款的回执。)