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尊敬的四海云客户:
为进一步提升云计算服务的安全与使用体验，四海云计算于12月28日正式启用全新网址www.4hai.cloud站点，原有www.sihaicloud.com同步并行使用，升级后四海云将采取国际通用货币美金(USDT)计算购买云服务.
系统台升级后大致保留原有风格，为更好的保护客户资料和云服务账单，首次登录用户中心时，请点击 “忘记密码”，输入账号注册的邮箱或者手机号获取验证码，重设密码后即可完成登录。如在使用过程中无法登录，或者忘记您的资料信息，我司唯一飞机客服@sihaivps或者support@4hai.cloud或cqyuanjian@foxmail.com将协助您登陆。值得注意的是，登录信息，邮箱或手机号码是作为唯一认证的方式，请您知悉！
四海云用户中心短暂升级以后，在账户管理、云服务器的购买、通知中心，账单管理，一键续费，以及发票的在线申请等方面均进行了全面优化与升级，为您提供更加安全、便捷的云计算服务体验。
感谢您在升级过程一如既往的坚持选择我们四海云，并给予理解与支持！四海云服务涵盖中国的阿里，腾讯服务合作，香港盈科，新加坡云计算，日本云服务商，以及美国的云计算合作商，四海均有深度和密切合作，采用的高带宽以及高配置的云计算器服务。
如有任何疑问，请随时联系在线客服飞机号@sihaivps
四海云计算(新加坡)私人有限公司
2025年11月28日
Dear 4hai Cloud Customers:
To further enhance the security and user experience of our cloud computing services, 4hai Cloud officially launched its new website, www.4hai.cloud, on December 28th. The existing website, www.sihaicloud.com, will continue to operate in parallel. After the upgrade, 4hai Cloud will use the internationally accepted currency, US Dollars (USDT), to calculate and purchase cloud services.
The system interface will largely retain its original style after the upgrade. To better protect customer data and cloud service bills, please click "Forgot Password" upon first login to the User Center. Enter your registered email address or mobile phone number to obtain a verification code, reset your password, and you will be able to log in. If you are unable to log in during use, or if you forget your information, our only customer service representatives at @sihaivps, support@4hai.cloud, or cqyuanjian@foxmail.com will assist you with logging in. Please note that your email address or mobile phone number is the only method of authentication.
Following a brief upgrade, Sihai Cloud's User Center has undergone comprehensive optimization and upgrades in areas such as account management, cloud server purchase, notification center, billing management, one-click renewal, and online invoice application, providing you with a more secure and convenient cloud computing service experience.
Thank you for your continued choice of Sihai Cloud during the upgrade process and for your understanding and support! Sihai Cloud's services cover partnerships with Alibaba and Tencent in China, PCCW in Hong Kong, cloud computing providers in Singapore, cloud service providers in Japan, and cloud computing partners in the United States. Sihai has deep and close cooperation with all of them, utilizing high-bandwidth and high-configuration cloud computing server services.
For any questions, please feel free to contact our online customer service via email at @sihaivps
SihaiCloud (Singapore) Private Limited
November 28, 2025