1793 - 1882), also known as Liu Long Gong, was a Chinese martial artist who most likely practiced the Fujian White Crane style of Kung Fu.

[2] The research of Tokashiki Iken indicates that he also went by the name of Xie Zhongxiang (謝宗祥), a man born in Changle, Fujian.

[4] Other aliases include Xia YiYi (謝如如), in local Fukian Dialect, or Xie RuRu, in modern Mandarin.

The research conducted by Filip Konjokrad points toward RyuRyuKo being Liu Long Gong (劉龍公), not Xie Zhongxiang.

Historical records provided by the Fuzhou Wushu Association show that Xie Zhong Xiang was not of aristocratic birth and never had to hide his identity.

Those who dispute the claims that Xie Zhong Xiang was Ryū Ryū Ko cite the fact that Xie Zhongxiang's nickname would have been pronounced "YiYi Go" in Fujianese Dialect, and not "Ru Ru Ko", the later being a modern Mandarin pronunciation of his nickname.

Historical records from Fuzhou Martial Arts Association show that Xie Zhong Xiang was referred to either by his full-name or known as Yi-Shi ( 如师) which means Yi-Sensei in Fujianese Dialect.

Those who dispute claims that Xie Zhong Xiang is Ru Ru Ko say that it is highly unlikely for Okinawan students to refer to their teacher of martial arts by his nickname "Brother Yiyi", and Ryū Ryū Ko's student Norisato Nakaima's claim that his Sensei's surname was "Ryu" (劉)is more plausible.

The okinawan martial artists who are believed to have studied in Ryū Ryū Ko's school were Higaonna Kanryō (founder of Naha-te), Arakaki Seishō, Norisato Nakaima (1819－1879) (founder of Ryūei-ryū), Sakiyama Kitoku (1830–1914), Kojo Taitei (1837–1915), Maezato Ranpo (1838–1904), Matsuda Tokusaburo (1877–1931).