Uechi next took up the study of herbalism and a Kung Fu system he identified as "Pangai-noon" (or Pangainun), under a Chinese master of Tiger and Crane styles of southern Kung Fu named Zhou Zihe (Called "Shu Shiwa" in Japanese and "Shu Shabu" by Kanbun). A great deal of unsourced apocryphal stories exist on how Kanbun met and came to train with Zhou Zihe. Furthermore, research conducted by the Uechi Family and the local Wushu association in 1984 discovered Shu Shiwa/Zhou Zihe was not the real teacher of Kanbun Uechi but maybe worked an assistant instructor. Huzunquan (Fujian Tiger Boxing) lineage charts show Zheng Xianji (郑仙纪) as Kanbun's true teacher. More recent research in the region with assistance of the Fuzhou Wushu Association does not provide a detailed answer. The Uechi Ryū "Kihon" claims that Kanbun Uechi never modified the teachings of Zhou Zihe and strictly passed on only what Zhou Zihe taught him. Review of current Uechi-Ryū practice with several styles in Fuzhou linked to Zhou Zihe, which all developed on their own subsequently, led the Wushu Association to suggest that Kanbun made his own modifications to make what he would call "Pangai-noon".