详细英文注册信息如下：
Domain Name: medun.cn ROID: 20241220s10001s63386349-cn Domain Status: ok Registrant: 杨兰兰 Registrant Contact Email: pingguo701@gmail.com Sponsoring Registrar: 北京网尊科技有限公司 Name Server: now2.dns.com Name Server: now1.dns.com Registration Time: 2024-12-20 04:03:30 Expiration Time: 2025-12-20 04:03:30 DNSSEC: unsigned