Chinese
Dissolve the yeast and sugar in the warm water, mix with the flour and knead for 10 minutes into a smooth dough; cover and let rise for about 1 hour, until doubled.
For the filling, stir the pork with the soy sauce, oyster sauce, wine, salt, pepper and ginger in one direction, adding the 60 ml of water a little at a time until it is absorbed and the mixture is sticky.
Mix in the green onions and sesame oil and chill the filling while you shape the dough.
Knead the dough briefly, roll it into a log, cut it into 16 pieces and roll each into a round about 10 cm across, thinner at the edge than in the middle.
Put a heaped tablespoon of filling in the center of each round and pleat the edge around it, pinching the top closed.
Set the buns on squares of baking paper in a steamer, cover and let rise for 15-20 minutes.
Steam over boiling water for 15 minutes, then leave the lid on for 3 minutes before opening.