In a fast-expanding city, building is no longer limited to a single building, but also extends to the scale of urban development. Since ancient times, China has had a tradition of “Residential & Commercial Mixed-Use”. With a conversion of different functions in the same unit, this greatly increases the efficiency of space-use. In modern times, using the Internet, mobile phones and other media, it is possible to convert the vertical stacking of living units, creating more natural space in busy and crowded cities, blending with traditional Hutong neighborhoods as Chinese long-axis paintings reflect the truest life.