I cannot find references to this in China.

This is a werid kata.

Apparently, it was taught to palce guards.....and got into Itosu's system via Tomari Te or Matsumura. So it could have even been Goten te, and passed onto a Tomari Pechin or matsumura himself.

Is this commonly practisced in Okinawan Shorin, besides Kobayashi Ryu? Does anyone know the old version? How does it differ from shotokan?