Convention-Guide.md

+When designing a State Machine, you need to know the purpose. Each State Machine has slightly different convention.
+
+## State Machine for...
+
+#### Manage users workflow
+For the event name, the event must answer this question:
+1. What is the event? (Ans: pay)
+2. How to trigger it? (Ans: by clicking the button or hit enter key)
+
+#### Manage system process
+...
+
+#### Resource management
+> just use State Management
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