$Document安全系统(DSS)$ 8-K - Current report Filed: 2019-11-01 AccNo: 0001493152-19-016341 Size: 2 MBItem 1.01: Entry into a Material Definitive AgreementItem 3.02: Unregistered Sales of Equity SecuritiesItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain OfficersItem 7.01: Regulation FD DisclosureItem 9.01: Financial Statements and Exhibits 网页链接