Jim Li, President of OffshoreTech and Dr. Alex Ran, CTO of OffshoreTech, participated in the Underwater Mining Conference held in St. Petersburg of Florida, United States. Dr. Alex Ran has presented a paper “A Riser and Lifting System (RALS) Concept for Deep Sea Polymetallic Nodule Mining” on behalf of JinAo Deepsea Technology. The paper contains part of scopes OTL has completed for a complete deepsea mining system conceptual design covering PSV, RALS and subsea robotic miner.