You can use the filling as it is, but for an extra step, turn some homemade chicken stock into jelly with the help from some gelatin, and then cut up and put that into the mix as well. Because once it's cooked, it will melt and make the dumpling extra juicy.
Don't worry too much about how the dumpling looks after sealing, because once it's sealed, place them seam side down so it doesn't really matter anyway.
The best way to serve it is to have it with Chinese black vinegar.