The Xi'an Satellite Control Center will exercise an north-south orbital control to FY-4B from 7:30 to 12:00 March 21, 2023(UTC). During the period, ground receiving stations shall cease to receive the cloud imageries sent by FY-4B from 7:30 to 12:00(UTC). Under a normal circumstance, the imageries’ positioning accuracy will see some bias within 24 hours after the orbital control. Please forgive the inconvenience caused.