（1）Procurement model
Enterprise sales support department summarizes the demand information of each region and each product line based on the communication with customers, sales forecast and formal orders every month, and feeds back the summary information to the planning management department. On the basis of reviewing the existing inventory and material preparation, the planning management department conducts fine-tuning and accounting on the demand data combined with the master production plan, market forecast, orders in transit, etc., and the material control personnel decompose it to the purchasing personnel. Purchasing personnel will issue purchase orders after approval by the leaders of different enterprises according to the purchase amount level, and organize production and delivery after the purchase order is confirmed by supplier.
（2）Manufacturing mode
After receiving customer orders, industry enterprises decompose customer needs based on existing products and technology platforms, and focus on standardized product sales, supplemented by partial customization, to form corresponding product design solutions. The company's products adopt a modular design, and the power modules can operate independently, or multiple modules can be assembled into a complete machine. In the production process, the enterprise first produces modules and then complete machines, which improves production efficiency while meeting the customized needs of customers; according to customer needs, it can deliver both complete machine products and module products to customers.
（3）Sales model
The sales methods of industry enterprises are divided into self-owned brand business and ODM business. Among them, ODM business mainly provides supporting products for system integrators and operators. The ODM business in the charging pile field of some industry enterprises is developing rapidly. Enterprises in the industry adopt a matrix sales structure combining regions and product lines. Each product line has a dedicated person in charge of the product line, and the person in charge of each region is responsible for the local sales of different product lines of the industry enterprise. Enterprises in the industry are also equipped with sales and product engineers to communicate with customers and solve business and technical needs. Sign business contracts and attached technical documents with customers after internal approval by industry enterprises. For non-standard product contracts, industry companies need to conduct additional technical reviews before signing to understand whether and how to achieve customer needs. After the contract is confirmed by both parties, the industry enterprise organizes production and delivery according to the contract.
