I received the news of an accident from my friend today. How should I write a greeting letter?

In fact, you don't need to pay attention to the greeting language, because it is only used to greet him. You don't need to have any scruples, just say hello to him from the beginning. For example, how is your health recently? Why is something wrong now? Or I heard that you have been having a bad time recently. Let me help you. In fact, don't care too much about the form of greeting, just express your thoughts. Add one directly between the beginning or the end, I hope you are all right, and then don't worry about getting better. These can generally achieve the effect of greeting messages.