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Cornerstone Technologies Holdings Limited engages in printing, charging, and energy businesses in Hong Kong. The company offers electric vehicle (EV) integrated charging solutions for homes and businesses, including supply and installation of EV chargers, developing EV charging-enabling infrastructure, central management system, hub for e-payment, load management system, and license plate recognition system to electric vehicles and smart parking. It also provides printing, typesetting, and translation services; and energy management solutions, including EV batteries and Solar photovoltaic systems.