According to HKFA, in Summer Holiday, 蕭依亨 (即蕭依婷)

Siu Yi-Hang / (蕭依亨)

Siu Yee-Ting / (蕭依婷)

I think they are the same and she has a few more alias:

蕭伊婷 (即蕭依婷) Desperation Verge

蕭依停 (即蕭依婷) Ransom Express

Can anyone confirm and updates? Thanks.

if nobody stops me in 15 days I will merge Siu Yi-Hang / (蕭依亨) and Siu Yee-Ting / (蕭依婷

merged:

Siu Yi-Hang
蕭依亨

Actor
Summer Holiday (2000)

and

Siu Yee-Ting ♀
蕭依婷

Actor
Guilty or Not (2000)
Ransom Express (2000)
Desperation Verge (2001) ... May