Hainengda (002583.SZ) recently said on the interactive platform that in addition to its main private network communication business, the company continues to expand its high-end EMS business at home and abroad based on its high-end manufacturing capabilities. Its customers are global optical communications, blockchain, automotive electronics, etc. An advanced enterprise in the industry. Blockchain technology is an important part of the company's EMS business. It mainly provides customers with part of R&D design and supply chain services. The company's wholly-owned subsidiary, Shenhai, has a cooperative relationship with many major brands of mining machinery companies, and has undertaken a large number of related businesses. The income has achieved rapid growth.