Cyprus and Lebanon are neighbors. They make an agreement about the sea between them. They sign the paper in Beirut.
This is important for Lebanon. Lebanon has money problems. The agreement can help Lebanon find gas in the sea. Gas can make money and jobs.
Cyprus is happy with the agreement. Cyprus says it is good for peace. The leaders of both countries say it is a good day.
Another country, Turkey, does not like this agreement. But Cyprus says the agreement is correct.
Now, both countries know where their sea is. This helps them work together.