Four Joy Meatballsis simple in ingredients.
URL: http://www.meishichina.com/Eat/RMenu/200601/5710.html

Four Joy Meatballs (the ingredients are a bit complex, but generally found in households)
URL: http://meishi.88838.com/pu/9373

Four Joy Meatballs (Northeastern flavor)
URL: http://meishi.88838.com/pu/12902

Four Joy Meatballs
URL: http://meishi.88838.com/pu/12903

You should be able to find the recipe here, give it a try!