Busan's Chinatown sits near the central station area and reflects a mix of Chinese, Russian, and port-city influences. Much of the old Chinese community has moved on, but the streets still make an interesting wander for dumplings, signs, and a different feel from the nearby markets.
It is not a polished heritage quarter, and that is part of the point. Come for a short walk and a cheap meal rather than a museum-like Chinatown experience.