What to do if "kissed" by a jellyfish?

NSW’s diving instructor, Bai Fan, has recently encountered more and more jellyfish while diving. To prevent jellyfish from biting you, you can wear a jellyfish suit. In addition, before swimming in the sea, it is best to confirm with the lifeguard that there is no jellyfish in this area. What to do if I am "kissed" by a jellyfish? It is not right to rinse with fresh water. Lucy Chen has more.