Rongcheng Garden Hotel is jointly built and developed by Hunan Jinxin Real Estate Co., Ltd. and Red Star Industrial, with a total investment of more than 1.5 billion yuan. The hotel covers an area of 24,943 square meters, with a construction area of 122,310 square meters. The hotel has more than 700 rooms of various types. Since the existing equipment uses natural gas for direct heating, cooling and steam production, it does not realize cascade utilization of energy, and the comprehensive energy utilization efficiency is not high, which affects economic benefits; air conditioning and refrigeration are used in summer, and the power is tight, which is prone to power cuts, which affects refrigeration and heating. Stable operation of working conditions, in order to optimize the energy structure, the hotel considers using natural gas distributed energy stations to supply electricity, cooling and heat sources.

The project was completed and put into operation at the end of 2015. Liyu provided 3 × 1.1MW gas-fired internal combustion generator sets for it. After the project was put into operation, the annual power generation capacity was 4.234 million kW, and the annual standard coal saving was 1348.6 tons. The annual average comprehensive energy utilization rate can reach 85%.