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Open Textbooks for Hong Kong • News System maintenance on 17 Jan 2025 10 June, 2018 - 18:35 Date/Time: 17 Jan 2025 (Fri) 11:00 pm to 13:00pm 1553586 reads Please note that system maintenance will be carried out as follows. The Open Textbooks service will be interrupted during the maintenance period. Date/Time: 17 Jan 2025 (Fri) 11:00 pm to 13:00pm