His father, Fong Tak, is a rich businessman while his mother Miu Tsui Fa is a highly-skilled martial artist. His mother is also the daughter of one of the legendary Five Elders of the southern Shaolin Monastery. According to legend, his mother breaks every bone and limb in his body after his birth and bathes him in Chinese Rubbing Alcohol to make him practically invulnerable.
Fong Sai-yuk's body becomes "copper skin and metal bone" after the treatment. According to legend, Fong Sai-yuk is killed by Bak Mei, the notorious pugilist in a battle of vengeance. But according to the history, Fong Sai-yuk was killed during the fight with Ng Mui during the burning of Shaolin. When the Ming dinasty was puted away by manciurian Qing dinasty, the people were not so happy about the new rulers. Some generals, officials and followers of the Ming started an anti Qing movement. A fact that was lost in history is that we can't say for sure if the monks hided on purpose the leaders of Ming or if the Ming rebels had infiltrate themselfs as monks in the Shaolin Temple from Henan.
Probably the monks were not to happy about the Qing rulers too, because for centuries they had the imperial suport and patronage. One of the Ming officials was the grandfather of Hung Hei Goon [founder of Hung Gar] who changed his family name from Jyu[Zhu] to Hung to honor the first Ming emperor Hung Mo [Hong Mu] wich is considered one of the best emperors that China ever had. Anyway, the Qing emperor named Sai Chung sent the army to destroy the Temple from Henan. Some of the monks and some of the rebels and also some members of the Ming royal family had escaped and took refuge in the southern China.
There at the Southern Shaolin Temple named Linquanyuan[Shaolin Fukien] they continued to spread the rebelion. One of the monks who escaped from the destruction of Songshan Temple was Zhi Shan[Ji Sin/ Jee Shim] and his student Hung Hei Goon. There at the Linquanyuan Temple the rebels had establish two secret anti Qing societys wich are known to be the first Tong organizations.This two societys were called Hung Moon [Hung Men] and Wing Chun Tong. From the activity of the secret anti Qing societies the Shaolin Fukien Temple was named Jiuliashan. Hung Hei Goon was not exactly a monk, he was a layman disciple of Ji Sin who eventualy became the abbot of Southern Shaolin Temple.
As a layman Hei Goon married Lau YingChun who gave birth to a son named Hung Manding. Later she will die and when in 1768 after what the emperor had sent the army to the southern Shaolin too and Hung Hei Goon rejoined the rebelion he met and married Fong Wing Chun who was a member of the Wing Chun Tong society along with Yim Wing Chun [founder of Wing Chun Kuen]. Fong Wing Chun was also named "The Third Lady of Wing Chun". Both Fong Wing Chun and Yim Wing Chun have learned the White Crane style from nun Ng Mui who was also identified as Fang Qiniang.
Later Hung Hei Goon will include elements from Withe Crane wich he learned from his wife in his own style. Some sources say that in the time of the Wing Chun Tong activity this systems were called Hung Fa Yi Wing Chun and Chi Sim Wing Chun and the first form of Wing Chun - Siu Lim Tao - was inspired by the members of the royal family of the Ming dinasty Chu. This is the real conection between Hung Gar and Wing Chun as Shaolin systems. Continuing with ower story, after the destruction of the southern temple the rebelion was spread. Ji Sin and Hung Hei Goon had returned to Jiuliashan after burning, and Ji Sin advised Hung Hei Goon to return to Guangdong and to continue the rebelion there.
So after the destruction of the Southern Shaolin Temple, those who escaped had to run and hide in different parts of Southern China. Among them were Ng Mui and Yim Wing Chun, Ji Sin, Hung Hei Goon, Choy Fok[master of Chan Heung - the founder of Choy Li Fut, Li Yao San founder of Li Gar and also one of Chan Heung's masters, and others. Later Ji Sin who had many followers had sent some of them to Kuantung to study with Hung Hei Goon. One of them was Luk Ah Choi who will continue the lineage of Hung Gar after Hung Hei Goon. The history of the most Southern Shaolin systems is conected in one way or another with this events, including the 5 classic family styles of Southern Shaolin Choy Gar, Li Gar, Mok Gar, Lao Gar, Hung Gar.
So this is why this styles are linked to Shaolin. Begining from this point in history this styles will be related with the most rebelions and anti Qing movements from China including The Boxers Rebelion. The english are those who called this societys "Triada". After the falling of the Qing dinasty some of this Tong's lost the conection with their ancestors anti Qing ideals of freedom and became what is today the chinese mafia. Based on some relics found in the 80's they establish the probably location of the lost Southern Shaolin Temple because the relics were making conection between Hung Moon society and Linquanyuan and later in the 90's they find it. Hung Gar as the other "classic family styles" is considered to be a school of Shaolin.
So from what i've read about Jow Ga Kung Fu history, Jow Lung had studied Hung Gar style of Shaolin and later Shaolin Kung Fu with a monk. Considering this, Jow Gar is related with Shaolin trough this two schools. Thats why we call it a Shaolin style. As many other styles wich also have their origins, legendary or not, at Shaolin. So this is how the Southern Shaolin styles are conected by history. The most of them have a lot of legends surounding their history, only for Wing Chun i've read about 5 different stories.
