This is Changchun - the Detroit of the East. On a street near Guangfu Road, vendors sell foreign currency and breathe the lively atmosphere. In a small shop, customers are crowded, and the buying and selling gods of Guangfu Road are the main consumers. Fast and warm food like a plate of dumplings is a must-have for fast food. Grandpa Sun's small shop has only sold three types of dumplings for over a decade: pork and pickled cabbage filling, pork and celery filling, and pork and chives filling. The beef platter of Grandpa Sun's is the perfect match for dumplings: beef marrow, beef tendon, and beef kidney are grilled together, with an unchanging taste for over a decade.