I don't know if you mean you are ready to join or learn by yourself. If you join he will give you a list of ingredients. I'm not sure about the cost of joining.

The other way is to go to those small storefront places to buy. The price here in Beijing is between 800-1300.

Don't know where you are now. If you are in Beijing. I can help you to introduce. Because I am the king of duck neck now.

To be honest. You'd better do an internship. Only rely on the ingredients list to do goods you can not do good things. Making goods depends on the fire ........... What's up.

Good luck~