At Dharma Drum Mountain it is a three and a half day affair. You get taught how to prostrate, salute and bow according to prescription. Everyone wears haiqing robes. There are video lectures by the late Master Sheng Yen as well as some speeches by monastics. You go through the motions of receiving the precepts until five-hundred people can manage synchronized bowing. Everyone is expected to memorize the liturgy.
The night before the precepts are given, there is a ceremony where the precepts as conferred unto the deceased and/or any other lingering non-corporeal beings hanging around the shrine hall. In the morning the precepts, which are a compilation from several East Asian sources, are conferred. The preceptor recites the liturgy and asks if you can uphold the individual precepts, to which you say yes. He then claps some wooden blocks together after each precept. Everyone is given a ceremonial sash (called the "bodhisattva cloth"), which goes around the neck. I don't believe there is any precedent for this in history. It was an innovation by DDM as far as I know. It looks like this:
The actual ceremony only takes a few hours, but for three days everyone is trained before rehearsing the ritual.
All the rehearsal might sound unnecessary, but for Chinese Buddhist it is all part of their spiritual transformation. The greater and grander the ritual, the more spiritual power it holds.
Elsewhere in Chinese Buddhism it is sometimes the case that bodhisattva precepts include incense scarring on the flesh. For laypeople I think it is usually done on the arm somewhere. Monastics of course take it on the scalp.