Rainbow Group Corporation (hereinafter referred to as "Rainbow Group") is a central enterprise managed by the State-owned Assets Supervision and Administration Commission. The group is headquartered in Beijing, and its main production bases are located in Xianyang, Shaanxi, the Yangtze River Delta, the Pearl River Delta and Hefei, Anhui. . IRICO Group has accumulatively achieved sales revenue of more than 100 billion yuan and realized profits and taxes of more than 10 billion yuan, making outstanding contributions to the vigorous development of China's electronic information industry.

Hohhot means "green city" in Mongolian. It is located in North China, the northern frontier, and the interior of the Eurasian continent. It is an important bridge connecting the Yellow River Economic Belt, the Eurasian Continental Bridge, and the Bohai Rim Economic Region. An important open central city along the border.

Lanzhou Zhongchuan International Airport, located in Zhongchuan Town, Yongdeng County, Lanzhou City, Gansu Province, China, is a 4E-level international airport, one of the main airports in Northwest China, the air gateway of Lanzhou City, the capital of Gansu Province, and an important airport in Northwest China.

Qiqihar is a prefecture-level city under the jurisdiction of Heilongjiang Province. It is also known as Hecheng and Bukui. It is located in the west of Heilongjiang Province. "Qiqihar" comes from the Daur language and means "frontier" or "natural pasture".

Qinghai Haidong City Sports Center Project consists of two groups of buildings: a stadium, a gymnasium, and a swimming pool, with a total investment of 635 million yuan. The project covers an area of ​​348 acres and a construction area of ​​63,300 square meters. After the project is completed, it can undertake domestic second-class events , at that time, Haidong citizens will be provided with good competition and fitness venues.

Shenyang Hunnan Avenue Expressway Tunnel has a standard section width of 27.5 meters and a widened section width of 48 meters, making it the widest urban expressway tunnel in Northeast China. The rapid road network system initially formed with Changqing Street Expressway and Shengli Street Expressway is conducive to supporting the outward release of urban functions, opening up the urban pattern, effectively alleviating traffic congestion in the central area, and strengthening the traffic connection between the peripheral new cities and the central area , it is of great significance to realize the southward shift of the city's second ring function.

Yantai Changyu Wine Industrial Park is a factory area for wine production. There are many pipelines in it, and the direction is relatively complicated. In particular, fire-fighting pipelines occupy a very important position. However, the temperature in Yantai in winter is lower than 0°C, and the fire-fighting pipelines are prone to freeze blockage, which requires thermal insulation facilities. Ensure the circulation of the medium in the pipeline.