Core Viewpoint - The company, Sudar Co., primarily acquires business through bidding and competitive negotiations, focusing on maintenance, remanufacturing, and spare parts services [1] Business Model - The maintenance and remanufacturing services are charged based on agreed prices for each instance, typically allowing customers a certain payment period [1] - Long-term cooperation contracts exist for spare parts and remanufacturing services, where pricing is predetermined and charged per batch [1] - Specialized services combine maintenance and spare parts, charging based on the customer's coal output [1] Equipment Rental and Sales - The company engages in the purchase or rental of idle equipment from sellers or lessors, which is then repaired and modified before being sold or rented to customers [1] - Pricing for each sale or rental is determined through bidding or competitive negotiations [1]