Dear conference team: We submitted two abstracts (ID: 150 and ID: 15 1) to the upcoming 19 International Parvovirus Symposium (2024). We are very honored and excited to receive the news of oral presentation by email recently, and we are actively preparing to participate. Unfortunately, according to the current process, we can't attend this meeting, and we are deeply sorry and regretful. The main reason: according to the relevant regulations of the hospital, it takes a long time to go abroad to attend the conference step by step. Therefore, there is no guarantee that we can get the necessary approval documents before the meeting deadline. To this end, we deeply regret. We sincerely apologize for not being able to attend this academic conference, and hope to attend the next academic conference to discuss and communicate with other scholars. We will continue to strive to improve our academic level and make full preparations for the next meeting, and hope to have the opportunity to share our report and future research progress at the next meeting. We hope you can understand our predicament and help us minimize the impact of this unexpected situation. Thank you for your support and understanding.