According to the Baidu map, Yunnan Deng Wei Technology Co., Ltd. found that the rental platforms for testing equipment in Kunming include Yunnan Dengwei Technology Co., Ltd. and Kunming Tan Jia Machinery Equipment Leasing Co., Ltd., providing customers with rental services such as equipment, information equipment and automatic monitoring and testing systems. Kunming, also known as Spring City, is a prefecture-level city, provincial capital, megacity and central city in central Yunnan, one of the important central cities in western China determined by the State Council, and an important tourist and commercial city in China.