Haiyang Sanxian Electronic Technology Co., Ltd. (formerly Qingdao Cheng 'ao Electronics Co., Ltd.) was established in 2010 with a registered capital of 127.934 million yuan.

Haiyang Sanxian Denso Co., Ltd. was established in January 2015 in Haiyang City, Yantai by THN Corporation of Korea and Haiyang Sanxian Electronic Technology Co., Ltd..

Haiyang Sanxian Electric Technology Co., Ltd. was established in August 2016 by Korea THN Co., Ltd. and Haiyang Sanxian Electronic Technology Co., Ltd.

Sanxian (Hebi) Electronic Technology Co., Ltd. was established in Shancheng District, Hebi City, Henan Province in November 2022.

Sanxian (Heze) Electronic Technology Co., Ltd. was established on August 1, 2023. It is located in Heze, Shandong Province, the famous hometown of peony. It is mainly engaged in supporting research and development for Hyundai, Kia, BYD, BAIC New Energy, BAIC, Beijing Hyundai, Huawei, Baidu, Foton, Xiaomi, Lantu, Chery and Meituan, and designs and produces automotive wiring harness.

The business scope of the company is mainly R&D, manufacturing and sales of related products in automotive wiring harness.

Haiyang Sanxian Electronic Technology Co., Ltd. focuses on the design, development, production and sales in automotive wiring harness. THN Co., Ltd. was established in 1986. The company has an independent technical research institute, which can develop the required vehicle wiring harness and related parts simultaneously with the automobile factory. Haiyang Sanxian Denso Co., Ltd. and Haiyang Sanxian Electric Technology Co., Ltd., which were jointly established by the two companies, have many advantages such as technology research and development, quality control, product manufacturing and capital, and can provide customers with cost-effective products.

The company's resource management is all managed by ERP system to ensure that the company's resources can be effectively used and tracked; The product quality control is completely managed according to the requirements of ISO:TS16949 quality management system, so as to ensure the effective control of the company's product quality and enable the company's products to meet customer requirements; The company is fully managed according to the requirements of Hyundai Motor and Kia Motors, and has passed the SQ certification of Hyundai Motor and Kia Motors.

Haiyang Sanxian provides vehicle wiring harness development, production and sales for Hyundai and Kia in Korea and BYD and BAIC New Energy in China. In the process of new product development, it has been recognized by customers and confirmed to be a long-term development strategic partner.

The company always adheres to the quality concept of "quality assurance, customer moving", constantly innovates and improves around improving customer satisfaction, strictly controls quality, tracks all-round services, and insists on making high-quality products; In line with the management concept of "justice, harmony, cooperation and service", we have trained a group of capable managers, a high-quality professional and technical team and excellent employees; Provide comfortable and elegant working environment for employees, create harmonious labor relations, and ensure the development of enterprises; Every three sages have a common goal: to open up a vast world of their own step by step and let the company grow with the development of customers!