Too bad I have only joined this forum last month otherwise I could give you some good suggestions.
Now, there is a movie by Ang Lee called gThe wedding Banqueth available to English speaking audiences. Although the wedding in there is a stereotypical wedding of Taiwanese but I think it will give foreigners a basic guide of what to expect. Warning: the theme of the story is about gay (if you are sensitive to gays, itfs probably not a good idea to watch this film) but the wedding in there is between a man and a woman in a Taiwanese style.
It turns out that I had misinterpreted this red envelope thing entirely. They did not receive this red envelope, but rather gave it out to certain members of their guests.
You can choose to give red pockets/envelopes instead of gifts, they also give out gifts or red envelopes to their guests for attending the wedding.
I heard that at weddings, "face" is everything. As a practical matter, what does this mean? I'm still not sure what this meant, so I guess from a non-Taiwanese point of view it's not something to worry about?
In Chinese/Taiwanese society, position within the group, rather than over the group or in distinction to it, is far more important than independence from the group. Likewise, respect for others ("face") is of paramount importance and is manifested through
gift giving, deference, not publicly disagreeing, public honours within a group, and so forth. Both relationship networks (guanxi) and the social stature of face (myan tzi) are enshrouded in public rituals (li), which express status, respect and bonding, in formal terms.
It seemed that if I dressed formally the same I might in America that I would be OK. My advice to anyone else who might be in the same situation I was in is to wear a nice dress suit and a nice tie. Nothing to worry about.
For Taiwanese/Chinese weddings, typical business suit would do it for men and for women a blazer with matching skirts or pants other wise a dress would be fine.
However I think in Indian cultures and Muslims cultures, people seem very traditional still in their weddings. At least that is what I have seen, but more and more Chinese/Taiwanese in general are getting married in contemporary Western style today.