I heard from people in the morning that there are many people going in the morning, most of them are tour groups or uncles, so if it is a parent-child, couple or individual, you can go in the afternoon. It stopped selling tickets at 3 pm that day. So you can buy an e-ticket online at around 1 pm, and then save the QR code to the ticket inspector at the ticket gate. At 3 pm is the last game of the Sea Beast Island "Happy Theater". Of course you can go early, but if you have been there in the afternoon, it is recommended that you go to Sea Beast Island to see the Happy Theater at 3 pm. Then you can choose which one to visit. Go to see dolphins or sharks first. Because I went alone, some were faster and didn't stay much. If you have never been to the aquarium, you can still enjoy it, and some places are still beautiful.