              const hiddenSelect = document.getElementById('provinceSelect');
                    hiddenSelect.value = province.code;
                    
                    // Enable ward dropdown and load wards
                    wardDropdown.enable();
                    const provinceWards = allWards.filter(ward => ward.parent_code === province.code)
                        .sort((a, b) => a.name.localeCompare(b.name, 'vi', { numeric: true }));
                    wardDropdown.setData(provinceWards);
