By generating a temporary credential for cross-account access, you can enable one of your Tencent Cloud accounts to play the role of another Tencent Cloud account, and manage Tencent Cloud resources within the scope of authority.
You already had multiple root accounts. If you want to create one, please refer to register. Assume that you have two Tencent Cloud accounts, Account A and Account B. You want to manage the resources under Account B by using Account B.