
Nanjing Huade Spark Plug Co., Ltd. (NHSP) manufactures and sells spark plugs, combining Bosch-transferred know-how with an advanced, system-driven production and quality approach.
Nanjing Huade Spark Plug Co., Ltd. (NHSP) is a spark plug manufacturer formed as a joint venture between Robert Bosch GmbH (Germany) and Nanjing Electro Ceramic Factory, now Nanjing LD (Group) Company. The company officially opened on April 2, 1996, and focuses on the manufacturing and sales of spark plugs for automotive applications.
Backed by mature manufacturing technology transferred from Bosch, NHSP aligns its production with international advanced standards and maintains a well-rounded management system. The company operates an MRP II computer system that supports key activities across contract management, raw material purchasing, rolling production planning, new product development, in-process quality control, storage control, and market and customer-service feedback.
NHSP positions its products as a preferred choice for OEM new-engine applications and leverages Bosch’s worldwide sales network to reach international markets. The company emphasizes consistent quality and up-to-date technologies and systems, with a commitment to delivering reliable products and service to customers worldwide.

Nanjing Electro Ceramic Factory—now Nanjing LD (Group) Company—is recognized as the cradle of China’s first spark plug, with LD-branded products known in domestic and international markets.
Bosch holds 51% equity and LD Group holds 49%.
Mature manufacturing technology transferred from Bosch strengthens NHSP’s capabilities and supports production in line with international advanced standards.
NHSP uses an MRP II computer system to manage contract appraisal and collection, raw material purchasing, rolling production planning, new product development, in-process quality control, storage control, and market and customer-service feedback.
NHSP products are positioned as a first choice for OE customers for new-engine applications.
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