What are Chinese fortune cookies made of?

Can you tell me what the main ingredients are used to make Chinese fortune cookies? Are they primarily made of flour and sugar, or do they contain other unique ingredients? Are there any traditional methods or secret recipes that have been passed down for generations in the creation of these delightful treats? Also, how do the fortunes inside the cookies come to be? Are they handwritten or printed, and is there a special process involved in inserting them into the cookies?