According to https://zh.wikipedia.org/wiki/??? those are all the same actress, but after watching the pictures I am not sure
https://zh.wikipedia.org/wiki/%E9%99%B3 ... B%E7%87%95
Hsiao Yen http://hkmdb.com/db/people/images.mhtml ... ay_set=eng
Chen Chiu-Yen http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng
Chen Hsiang-Lan http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

In case there has been 2 ?? in Taiwan the same time then their filmographies maybe mixed up I am afraid

I am not sure, the portraits of Hsiao Yen are too thin.

If you want to merge actors that has entries in HKMDB, please find actual proof from the movies that has entries in HKMDB, i.e - screencaps, images from the movies they are listed for. This is usually not that difficult.

Hsiao Yen and Chen Chiu-Yen according to the images are obviously different people.
?? might be a nickname, a personal name or a diminutive form of the name that has ?. So basically there could be hundreds of girls named ??, that has completely different full names.

According to https://zh.wikipedia.org/wiki/??? those are all the same actress, but after watching the pictures I am not sure
https://zh.wikipedia.org/wiki/%E9%99%B3 ... B%E7%87%95

Wikipedia is not a movie database, the people who do the entries usually don't care about very details.
We are movie database. We have to check every detail.
There are many nuances in Chinese names, and also many chances of different people has the same name. Please, don't do blind merges.