def __get_type_NHC(code):
    """
    Get the intensity category according to the status of system defined by
    "National Hurricane Center".
    
    Reference:
    https://www.nhc.noaa.gov/data/hurdat/hurdat2-format-nov2019.pdf
    
    0 - Subtropical cyclone of depression intensity;
        Subtropical cyclone of storm intensity;
        A low that is neither a TC, a subtropical cyclone, nor an EC;
        Tropical wave;
        Disturbuance          (OTHERS, unknown intensity)
	1 - Tropical depression	  (TD,   <34 knots)
	2 - Tropical storm	      (TS, 34-63 knots)
	3 - Hurricane             (HU,   >64 knots)
	4 - Extratropical cyclone (EC, any intensity)

    Parameters
    ----------
    code : str
        A string code represents the type.

    Returns
    -------
    re: str
        One of the type in ['TD', 'TS', 'HU', 'EC', 'OTHERS'].
    """
    return code