<p>Subscription is the billing method of paying before using. You need to pay fees before using resources and services. Subscription is paid per month.</p> <p><strong>Billing Cycle</strong></p> <p>The billing unit of subscription is RMB per month. It is billed per month and the billing cycle is based on time zone of UTC+8.</p> <p>Billing cycle starts from the time when the resource is opened and ends at the time when the resource is completely released. The time is accurate to seconds.</p> <p><strong>For example</strong>: Suppose you open an instance for a month at 08:00:30 of February 5, 2018. The billing cycle starts from 08:00:30 of February 5, 2018 and ends at 08:00:30 of March 5, 2018.</p> <p>Before a billing cycle expires, the system will remind you that the instance is to be expired by sending a SMS, email or private message. If you want to continue to use the resource, you can renew the ECS instance by manual renewal or auto renewal. If you do not want to use the resource, you can release the instance after you complete backup.</p> <p>If a subscription product expires and does not stop service, it will be automatically billed per day after expiration. The price per day is price of monthly subscription/30.</p> <p><strong>Billing After Changing Configuration</strong></p> <p>Upgrade Configuration</p> <ul> <li>Instance of monthly subscription is not limited on frequency of upgrading configuration.</li> <li>Upgrading configuration at any time is supported. New upgraded configuration would take effect immediately and cover the remaining cycle of the instance.</li> <li>Billing rules: Price difference of the remaining cycle (including the current cycle) needs to be made up. It is billed based on high configuration in the month when upgrading configuration.</li> </ul> <p><strong>For example</strong>: You purchased a cloud host for five months on January 22, 2018 and it will be expired on June 22, 2018. On February 27, 2018, you want to upgrade configuration. Then</p> <p>Fee for upgrade order = (monthly subscription unit price of new configuration - monthly subscription unit price of old configuration) * (5-2+1).</p> <ul> <li>If it has discount that causes price of new configuration is no more than price of old configuration, then the fee for upgrading configuration is set as zero.</li> </ul> <p>Degrade Configuration</p> <ul> <li>Instance of monthly subscription is not limited on frequency of degrading configuration.</li> <li>Degrading configuration at any time is supported. New degraded configuration would take effect immediately and cover the remaining cycle of the instance.</li> <li>Billing rules: In the month when degrading configuration, it is billed based on high configuration before degrading. When settling the remaining fee after degrading configuration, if it is over zero, the remaining fee will be returned to users in the form of a voucher; if it is zero, no action is needed.</li> </ul> <p><strong>For example</strong>: If you purchased a cloud host for five months on January 22, 2018 and it will be expired on June 22, 2018. On February 27, 2018, you want to degrade configuration. Then the remaining fee = (monthly subscription unit price of old configuration - monthly subscription unit price of new configuration) * (5-2).</p> <ul> <li>Voucher Return Rules</li> </ul> <p>（1）&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The face value of a voucher is the remaining fee.</p> <p>（2）&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The valid period is three years, starting from the day of refund.</p> <p>（3）&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It is applicable to the product that is degraded configuration. If it is an ECS, the voucher is applicable to an ECS and an EBS.</p> <p>（4）&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It is applicable to the payment method of subscription.</p> <p>（5）&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; It is applicable to new purchase, renewal and upgrade.</p> <p>（6）&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The frequency of use and deduction amount are not limited.</p>