$核心能源(EFOI)$ 8-K - Current report Filed: 2019-05-30 AccNo: 0000924168-19-000044 Size: 118 KBItem 1.01: Entry into a Material Definitive AgreementItem 3.01: Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of ListingItem 4.01: Changes in Registrant's Certifying AccountantItem 5.03: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal YearItem 9.01: Financial Statements and Exhibits 网页链接