Due to the impact of the COVID-19, customers could not come to our factory for on-the-spot investigation, the sales and technical personnel of the Product Marketing Center have to connect with them remotely through online video. After several on-line technical exchanges and negotiations, the two sides reached a cooperation intention and signed a supply contract. Last July the drilling rig was shipped in containers. Message came from Russia mentioned that ZDY4000S full hydraulic tunnel drilling rig has been put into operation in the oil mine, and the drilling rig’s excellent performance meets the requirements.