1, time limit: there is a time limit for receiving and using diamonds, and it will be invalid when it expires.

2. Use restrictions: diamonds donated by some activities can only be used in specific scenes or activities.

3. Account binding: The use of diamonds requires the binding of automatic and faster accounts and payment channels.

4. Network failure. Sometimes, due to network failure and other reasons, there will be problems in the process of exchanging or using Aauto fast drill. At this time, you need to wait for a while before trying.