By referring to other online conferences, we have a refund policy. If the conference receives your written cancellation email before 1 June 2022, the US$ 50 cancellation charge will be imposed and the balance registration fee will be returned to you. If the conference receives your written cancellation email between 1 June and 30 June 2022, the US$ 100 cancellation charge will be imposed and the balance registration fee will be returned to you. If the conference receives your written cancellation email after 1 July 2022, the paid registration fee will not be refunded.