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?