Core Points - Beijing Xiaomi Mobile Software Co., Ltd. has obtained a patent for a method and device for sending and receiving HARQ-ACK, with the patent number CN115316012B and application date of March 2021 [1] - The company was established in 2012 and is primarily engaged in software and information technology services [1] - The registered capital of Beijing Xiaomi Mobile Software Co., Ltd. is 148.8 million RMB [1] - The company has made investments in 4 enterprises and participated in 139 bidding projects, holding a total of 5000 patent records and 123 administrative licenses [1]