Siopao are Chinese steamed bread buns filled with meat , vegetables or sweet filling . "Siopao' is the Cantonese pronunciation for the steamed bread buns.
Siopao is the Filipino version of the Chinese baozi . It is also called salapao in Thailand.
It is a popular food item in the Philippines. It does not require utensils to eat and can be consumed on-the-go. Like baozi, there are several siopao stuffing varieties which could be either Asado or Bola-bola that may be using pork, chicken, beef, shrimp, eggs, and possibly chopped scallions and water chestnuts as well.
Outside of the Philippines, many Filipino restaurants offer variants of siopao with local ingredients ranging from and canned pineapple in Hawaii, to haute cuisine concoctions involving foie gras and truffles. '''' It could also be possible for a very rare variant of "Cat Siopao" - where stuffed inside Mantou is cat's flesh. In the Philippines, it's just usually a joke, but technically possible and most probably practiced.