[Amazon Web Services] 申请 EC2 instance quota 问题

我想在 AWS US region 上申请一个 EC2 实例，但是部署到时候遇到
“Instance launch failed
You have requested more vCPU capacity than your current vCPU limit of 0 allows for the instance bucket that the specified instance type belongs to. Please visit http://aws.amazon.com/contact-us/ec2-request to request an adjustment to this limit.”

然后我提了 support ticket,过了一天把 ticket 关了，但是 quota 还是 0 ，是中国 ip 不能申请美国的 ec2 资源吗？