1. Enterprises capable of developing and manufacturing DCS systems can provide specifications, patent certificates, business licenses, completed DCS system projects, sales contracts, etc. Or you are the agent of DCS system manufacturer, with authorization certificate, agent certificate, etc. Or DCS system service provider, you don't produce it yourself, but you can provide related services and products, including manufacturer authorization, service authorization, technical certificate, service contract and so on.
2. Design and manufacturing licenses are only provided to DCS system manufacturers. If not, you can ask the manufacturer for it.