This is a traditional Chinese dish that is seen as unusual by some but is very tasty and worth a try. Serve with rice.
Pig's trotters can be purchased at your local butchers. You may need to place a special order for them.
Rice wine and rock sugar can be purchased in Asian speciality shops.
For Gluten free options, ensure you use the Wheat free soy sauce. Most standard soy sauces are wheat brewed.