I think these two screenwriters could be the same person...

Daai On Ping (credited just for Boat People)
http://www.hkmdb.com/db/people/view.mht ... ay_set=eng

Yau Daai On Ping
http://www.hkmdb.com/db/people/view.mht ... ay_set=eng

I'm not convinced that they are. They seem to be listed as separate individuals in the HK Filmography. Further investigation needed I think.

It seems that you are right.

Here's a snapshot from the credits of Boat People...


...and it seems to be different from the Yau Daai On Ping credit listed on hkmdb: 邱戴安平 (http://www.hkmdb.com/db/people/view.mhtml?id=5667&display_set=eng).

But in my opinion it's just strange that these two names are so similar. And Stanley Kwan has been for long Ann Hui's assistant director. I'm still not convinced at all. I'll try to find more info...

In past editions HKIFF didn't do a retrospective focused on Ann Hui? Anyone could help us to solve this question?

Hah, you beat me to it. I dug out my copy of the vcd last night too and found the same thing you did.
Are they one and the same?

Two more FOR:
http://www.hkx.it/a013.html
http://www.lovehkfilm.com/features/hkfa_1982.htm
Also, John Charles's Filmography

AGAINST:
http://www.movieworld.com.hk/zine/Award/hkfa/07.shtml
http://www.dianying.com/cgi-bin/titleen.cgi?tbn1982
- warning dianying in English has beaucoups popups -

HKFA:
Title: 投奔怒海 - Boat people / - 導演, 許鞍華.
Publisher: 香港 : 青鳥電影製片有限公司, 1982. 1982 [首映].
Description: 106 分鐘 : 有聲, 彩色 ; 35 mm.
Notes: 香港電影中罕有的題材 : 越南解放後的政治悲劇.
DVD III ; 中國星.
Credits: 編劇, 戴安平 ;

It's a tossup at the moment.

I found a credit in the HKIFF retrospective on the Eighties that lists the credit as Yau Tai Oi Ping. So, if it hasn't been done, I'll change the entry to reflect this.