You can buy props from the patch, and choose "Notes Made by the Preacher 2" to buy them.

Open the map in the game and go to Lienia's _ Stream Bank.

After coming here, you can enter the cave by the river and reach Liu Dong Cave.

You can see Patch in the depths of the cave, attack him, and have a conversation after defeating the blood.

Then buy props, get Loya fruit at the border, and make chicken feet through synthesis.