As the name suggests, the ao dai is a Vietnamese long dress that is worn by men and women (although it is mostly associated with women). The ao dai looks similar to the qipao (a Chinese dress with long sleeves), but is much older, dating back to the 18th century, while the qipao originated in the early 20th century. This LoRA has been trained to utilize many colors (although some colors need to be emphasized in order to appear). As for the designs, one can use any design that they want.
As a side note, please correct me or offer feedback.