Overview of important developments overnight on May 21

12:00-21:00 Keywords: OpenAI, SpaceX, Variational, US-Iran 1. Samsung Electronics Union has allegedly postponed the strike; 2. OpenAI is reported to be preparing to submit an IPO application in the next few days or weeks; 3. SpaceX disclosed that it holds 18,712 bitcoins, worth more than 1.4 billion US dollars; 4. Variational completed US$50 million in financing, led by Dragonfly Capital; 5. ExaLabs received US$250 million in financing led by a16z, and its valuation rose to US$2.2 billion;6. Report: The text of the U.S. -Iran agreement enters the final polishing stage and is expected to be released within hours; 7. FOMC meeting minutes: Many policymakers prefer to remove the easing bias in policy statements.