Your Tencent Cloud account needs to go through identity verification before any CVM instances can be purchased.
Identity verification: Tencent Cloud has two types of identity verification: personal identity verification and enterprise identity verification. For more information, refer to the identity verification guide.

Purchase Limits for Pay-as-You-Go CVM Instances

Pay-as-you-go CVM instances do not allow:

• Agents paying on your behalf
• 5-day unconditional refunds
• CVMs with shared cores
• Bandwidth packages and postpaid monthly billing plans
  • The purchase limit of pay-as-you-go CVM instances for each user in each availability zone is between 30 and 60. Please see the CVM purchase page for the exact purchase limit.