With the rapid growth of China’s construction industry, energy demand and energy saving for building heating and cooling are of great importance [1]. In the year 2019, significant achievements were made in the development and use of geothermal energy in China. By the end of 2019, the construction areas with shallow geothermal energy applied had reached around 841 million square meters in China, ranking first in the world. Among the shallow geothermal energy technologies, ground source heat pumps (GSHPs) have the advantages of energy saving, high efficiency, environmental protection, and cleanliness, and consequently, they are widely used in building HVAC applications. Consuming low electric power, the technology of GSHPs can transfer low-temperature thermal energy to high-temperature thermal energy. With this technology, reservoirs in shallow ground layers, including soil formation, aquifers or lakes, etc., can be used as the heat source for heating in winter, or as the heat sink for cooling in summer. From 2020, the development and use of geothermal energy in China is showing wide application prospects, featured by the large-scale development of shallow geothermal heating (cooling), the promotion of a commercial development mode of medium and deep geothermal heating, and the wide application of “geothermal energy +” [2].