Dragon City is mobile games. And mochiabc is online educational games, learning games, pc game, mobile games support for Dragon City.
Your PlayerID (UserID) number is the identifier for your account. You can find at settings in game (it is UserID)
Your SessionID is seem like a password temporary that you can load information in Mochi ABC, then Mochi ABC will help you play game easier.
You can read more guide how to get PlayerID and SessionID in here. Remember pick right your mobile device, then you can watch guide suitable for your device.
Required: PlayerID And SessionID That introduct above
Fill PlayerID and SessionID to mochiabc, Fill 3 characters of captcha (don't fill mochiabc.com to captcha). Example only: 4fv
Then click button "Load Information". Then you can see your information is loaded
Mochi ABC can help you speedup egg in hatchery, speedup breeding, complete video game from server game.
And some feature need more cpu in server game, so you need to purchase used. It maybe Auto, Mod feature.