Is anyone clear about the procurement model of Wuhan Tianyuan Environmental Protection?

Mainly raw material procurement and subcontracting services procurement of two parts. Raw material procurement mainly includes general materials (such as membrane, steel), equipment (such as pumps, valves), electrical control class (such as electrical automatic control equipment, instrumentation) and so on. Subcontracting service procurement mainly refers to the Tianyuan environmental protection in the process of project implementation, generally subcontracting non-critical links.