Wuxi Dongxia Electrical and Mechanical Co., Ltd. (hereinafter referred to as "Dongxia") was formerly Taihu Heating and Cooling Equipment Co., Ltd. established in the 1990s. It produced "Dongxia" brand air conditioners and was later established in a joint venture with Nakatomi, Japan. Today's winter and summer. For the past 20 years since the establishment of the "Winter Summer" brand, it has been focusing on the air conditioning and processing industries. Now the main products of winter and summer are: mobile industrial air conditioners, industrial dehumidifiers, mobile electric heaters, fuel air heaters, etc., which are running " DONGXIA, "Winter and Summer", "Nakatomi" and other brands provide help in cooling in industrial environments such as summer employees, products, precision equipment, and outdoor operations.

Dongxia's production and operation headquarters in China is located in Wuxi, Jiangsu, a city in the Yangtze River Delta. It has a modern factory warehouse of 30,000 meters, fully automatic assembly line and testing equipment, as well as a huge technical R&D team, and has the ability to produce 500,000 air conditioning equipment annually. It has obtained more than a dozen national patents and has passed a series of certifications such as the United States ETL, Japan PSE, EU CE, China CCC, and South Korea KC.

80% of winter and summer products are sold back to Japan, and the rest are sold to dozens of countries and regions such as the United States, Australia, New Zealand, Thailand, Vietnam, Russia, Hong Kong, and Taiwan. With professional and excellent product performance and reliable quality assurance, winter and summer have effectively cooperated with many Fortune 500 companies. Over the past 20 years, winter and summer products have served more than 200,000 companies around the world, and are constantly working hard to improve their working environment.