Hainan Jinpan Electric Co., Ltd., a Sino-American cooperative enterprise, is located in Haikou Free Trade Zone. It is a company specializing in the production of new power transmission and transformation equipment with energy-saving and environmental protection characteristics. Its leading products include: resin-insulated dry-type power transformers, distribution transformers, grounding transformers, arc suppression coils, box-type substations, high-voltage and low-voltage complete switches and other special electrical products with a voltage level of 35KV and a capacity of 20000KVA and below, with an American standard of 50,000 square meters.