If you do an ordinary fishing task, you may get the "Liuboshan Fishing Contest Registration Form", and then go fishing at the Liuboshan seaside on line 1-5 within 18: 00 (it is best to exchange the bait registration form at Heyang Hayes Fisherman's House at 18: 00). One of them is "Pearl". After you get the pearl, go to Liuboshan iron pot (near Liuboshan NPC) and cook it, and you will get pearl powder. Take it to the Eight Immortals Restaurant in Yin Tian to find the color of NPC, and he will give you a book. This task is easy.