 RADNOR, Pa., June 4, 2021 PRNewswire -- The law firm of Kessler Topaz Meltzer Check, LLP reminds investors that a securities fraud class action lawsuit has been filed against Canaan Inc. NASDAQ: CAN Canaan on behalf of those who purchased or acquired Canaan American Depositary Receipts ADRs between February 10, 2021 and April 9, 2021 , inclusive the Class Period. 