On March 23, the management department of the science and Innovation Board Company of Shanghai Stock Exchange issued an inquiry letter to Amethystum Storage Technology Co.Ltd(688086) . The announcement shows that the share pledge of the controlling shareholder is to provide pledge guarantee for the company’s actual controllers Zheng Mu and Luo Tiewei to Huang Dahe’s loan. The Shanghai stock exchange requires the company to verify and disclose: the specific occurrence time of the relevant loan, the main contents of the agreement, the specific purpose of the loan funds, the source of Huang Dahe’s loan funds, and whether there are other potential creditors of the loan; Specific repayment arrangements and de pledge arrangements; Zheng mu, Luo Tiewei, Zichen investment, Zihui investment and Huang Dahe and other parties have other agreements on whether the shares held by the controlling shareholders have other agreements, specific time and content; The capital exchanges and transactions between Zheng Mu and Luo Tiewei and Huang Dahe and their related parties, and whether there are other cooperation or interest arrangements.