CCASS online services will be suspended on 13 May, 20 May, 27 May for facilitating internal system testing and upgrading activities. The Production Reports will be available on the upcoming Monday for the above Saturday.
resource:https://www.hkex.com.hk/-/media/HKEX-Market/Services/Circulars-and-Notices/Participant-and-Members-Circulars/HKSCC/2023/ce_HKSCC_SET_015_2023.pdf