Zung Jung is a relatively new style of mahjong. It is less defensive than riichi, but it has much more opportunity for defense than Mahjong Competition Rules. There is very little available to learn to play Zung Jung well. I'd like to change that, and maybe you can help.
If you have a question about Zung Jung, particularly a strategy question, please send it to me. I'll answer it here, and maybe we can generate a good reference for ourselves and others.