 Gridsum Holding Inc. Gridsum or the Company NASDAQ:GSUM, a leading provider of cloud-based big-data analytics and artificial intelligence AI solutions in China, today clarified its relationship with Mininglamp Technology Group Limited Mininglamp and Leading Smart Holdings Limited Leading Smart Holdings, the joint filers of a Schedule 13D filed on June 9, 2020 with the U.S. Securities and Exchange Commission the Schedule 13D. 