將軍澳官立中學 黃棟材老師 選用eClass 提高教與學的質素 黃棟材老師於將軍澳官立中學任教電腦科,並兼任校…
You can see how this popup was set up in our step-by-step guide: https://wppopupmaker.com/guides/auto-opening-announcement-popups/