TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The solid-state reactant comprises at least one of sodium borohydride, potassium borohydride, magnesium hydride and aluminum powder, and the liquid-state reactant comprises at least one of water, cobalt dichloride solution or nickel dichloride solution.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The hydrogen production unit comprises: a first zone for storing the solid-state reactant; a second zone for storing the liquid-state reactant; and a barrier layer for separating the first zone from the second zone, where the liquid-state reactant comes into contact with the solid-state reactant when an opening is formed on the barrier layer between the first zone and the second zone. The hydrogen production unit comprises an inlet valve and, when the inlet valve is opened, the liquid-state reactant comes into contact with the solid-state reactant. The inlet valve is made of a water-soluble material, where the water-soluble material comprises polyvinyl alcohol. The inlet valve is a pressure sensitive valve opened via a pressure difference. The fuel cell unit further comprises a water-repellent permeable membrane to cover the membrane electrode assembly, the anode current-collector and the cathode current collector. The portable carrier is a life jerkin (48) or a life buoy. The hydrogen production unit is disposed inside the life jerkin, the hydrogen production unit comprises fluid bag, fuel chamber and separation membrane disposed between the fluid bag and the fuel chamber, the liquid-state reactant is stored in the fluid bag, and the solid-state reactant is stored in the fuel chamber. The inlet valve comprises at least one check valve. The life buoy contains oxygen gas and a cathode of the fuel cell unit comes into contact with the oxygen gas. The life preserver further comprises a signaling device electrically connected with the hydrogen power supply module and receiving the electric power to transmit a signal. The signal comprises at least one of very high frequency signal, global positioning signal, light signal, electrical signal or audio signal. The portable carrier comprises at least one of floating plate, floating mark, hand stick, flash light, backpack or black box.