In February, delivery of four sets ZDY4300LF(A) Full Hydraulic Crawler Drilling Rigs were was affected by the sudden outbreak of COVID-19. With the permission of the Pandemic Prevention Department and a series of protective measures, CCTEG Xi’an Research Institute coordinated and cooperated closely with each other to deliver the rig in an orderly manner. The crawler drilling rigs have successfully arrived in Russia in March and will play an important role on coal mining safety.