Shandong Longertek Technology Co., Ltd. is a China-based company principally engaged in the research and development, production and sales of air conditioning for rail transit vehicles and inverter controller products. The Company’s main products include urban rail transit vehicle inverter air conditioners, inverter controllers, railway locomotive air conditioners and commercial inverter air conditioners. The Company’s products are mainly used in the field of urban rail transit. In addition, The Company also provides maintenance and repair services. The Company distributes its products both in the domestic and to overseas markets.