Does anyone know anything about the groundfighting style from Laiyang called Shui Kou Men?

Jiang Hua Long, Song Zi De and Cui Shou Shan were all said to have also mastered it.

Heres the small bit of info I have on it: http://www.monkeystealspeach.co.uk/shui-kou-men.php

Has anyone had any exposure to it when theyve trained in China? There is no info in English about it on the web and I only found 2 articles in Chinese... neither of them very revealing.....