1.The Playground is a web-based online coding experience service provided on the official website of the Cangjie programming language. You can experience writing Cangjie code and running it in the web code editor. 2.When you write code in the web code editor and click "Run", the code will run in the Sandbox on the backend server and return the results. 3.For the sake of the stability and security of the Playground function, we have prohibited some system calls and retained some standard library interfaces that are not system calls. 4.If "Runtime Exception XXXX XXXX" appears, it means that there is a disabled system call in your code. 5.The Playground will not store any code of any developer. After you close the web page, the code will be deleted. Please save your own code properly.