http://hkmdb.com/db/people/view.mhtml?id=6391
http://hkmdb.com/db/people/view.mhtml?id=6281

I checked both 'Magic Crystal' and 'Love Me and My Dad' and he was credited as ??? in both of those, so ??? seems to be a mistake and not a valid alias.

If nobody stops me in 15 days I will merge them.

Merged

???
Lau Siu-Gwong
Aliases: Liu Shao-Kuang, Liu Zhao-Guang

Filmography (1986-1988)

Editor (2 films)
Magic Crystal (1986)
Love Me and Dad (1988)

and

???
Lau Shiu-Gwong
Aliases: Liu Shao-Kwang, Liu Shao-Guang

Filmography (1977-1986)

Actor (1 film)
Yellow Peril (1984)
Editor (33 films)
Innocent Lust (1977)
The Master (1980)
Challenge of the Gamesters (1981)
Ambitious Kung Fu Girl (1981)
One Heart One Spirit (1981)
Rolls, Rolls, I Love You (1982)
Mercenaries from Hong Kong (1982)
Winner Takes All (1982)
Gang Master (1982)
Lovers Blades (1982)
The Lady Assassin (1983)
On the Wrong Track (1983)
Hong Kong Playboys (1983)
Holy Flame of the Martial World (1983)
Bastard Swordsman (1983)
Return of the Bastard Swordsman (1984)
The Siamese Twins (1984)
I Love Lolanto (1984)
Secret Service of the Imperial Court (1984)
The Big Sting (1984)
Prince Charming (1984)
Sex Beyond the Grave (1984)
Wits of the Brats (1984)
Misfire (1984)
An Amorous Woman of Tang Dynasty (1984)
Girl with the Diamond Slipper (1985)
The Flying Mr. B (1985)
Pursuit of a Killer (1985)
Puppy Love (1985)
Crazy Shaolin Disciples (1985)
How to Choose a Royal Bride (1985)
The Young Vagabond (1985)
On the Red (1986)