详细英文注册信息如下：
Domain Name: rk4.cn ROID: 20210526s10001s36299745-cn Domain Status: ok Registrant: 叶子英 Registrant Contact Email: 15035405@qq.com Sponsoring Registrar: 阿里云计算有限公司（万网） Name Server: promotion.dnspod.net Name Server: flea.dnspod.net Registration Time: 2021-05-26 04:05:41 Expiration Time: 2026-05-26 04:05:41 DNSSEC: unsigned