A girl hasn't contacted for a long time, and suddenly one day she sent a message asking me: What's going on?

If a girl hasn't contacted you for a long time, and then suddenly sends a message asking what you are doing, there may be the following situations:

1. She may suddenly think of you and want to know your recent situation, so she asks what you are doing.

She may want to re-establish contact with you and see if your friendship or feelings can continue.

She may need your help, so ask what you are doing first, and then tell you that she needs your help.

She may have some affection for you and want to start a conversation by asking what you are doing to see if there is any chance to further develop the relationship.

In either case, you can reply what she is doing first, and then judge her intention according to her reply. If she just wants to talk to you, you can talk to her easily; If she wants to ask you for help, you can see if you have the ability to help; If she has some affection for you, you can express your thanks and respond appropriately, but you should also be careful not to cause misunderstanding or pressure to her.