The most favorable orientation for buying a house in Guangzhou is generally considered to be facing south. This preference is rooted in traditional Chinese architectural principles and modern scientific research. According to a study by the Guangzhou Institute of Building Research, southern-facing houses in Guangzhou receive the most sunlight throughout the year, which is crucial for energy efficiency and comfort. The southern orientation allows for maximum exposure to the sun during the winter months, providing warmth and reducing heating costs, while minimizing direct sunlight in the summer, which helps to keep the house cool and reduces cooling costs. Additionally, southern-facing houses tend to have better ventilation, as the prevailing winds in Guangzhou come from the south. This orientation is also associated with higher property values in the city.