The old-fashioned Shanghai buns have a variety of flavors, with the dough fermented using old starter. The spicy meat buns, sauerkraut buns, and chive buns are all well-received. The spicy meat buns are juicy with a moderate level of spiciness; the sauerkraut buns are sweet and sour; and the chive buns are filled generously but have a milder taste.
Old Shanghai buns are a snack that's often enjoyed while shopping for groceries at Yongchun Market on weekends. They come in a variety of flavors, and the dough is made from fermented old dough. The business is usually quite good. When I arrived this morning close to 10 AM, they hadn't started operating yet, and by the time I finished shopping and came back, there was already a long line.
Today, I bought three: spicy meat bun, chive bun, and sauerkraut bun. My preference ranking is spicy meat bun > sauerkraut bun > chive bun.