1. Do the main task first, and find Anglin in the middle of the lake to get the fishing rod and bait.

2. Come to the seaside of the map, any seaside can be used, as long as you can use the position of the fishing rod to fish.

3. Click the "Prop" button below, then select "fishing rod" from the props you have, and then click "Take out the rod" on the right to fish, consuming bait to fish.

4. When the prompt "The fish is biting the rod" appears, click "Retract the rod" on the right, and then click "Retract the rod" to control the position of the slider to keep the hook in the position of the fish.

5. You can fish until the progress reaches 100%, and unlock the corresponding fish picture book.