Questcorp Mining and Riverside Resources Complete Expanded Drone Aeromagnetic Survey at La Union Project

Vancouver, British Columbia--(Newsfile Corp. - May 21, 2026) - Questcorp Mining Inc. (CSE: QQQ) (OTCQB: QQCMF) (FSE: D910) (the "Company" or "Questcorp") along with partner Riverside Resources, has completed an expanded aeromagnetic drone survey at the La Union Project in Sonora, Mexico. The new data, together with property-wide structural mapping and the high-grade Phase 2 sampling results announced May 5, 2026, are being used to refine drill targets ahead of the fully permitted summer drill program.