However the unstable natural remanent magnetizations which failed in the magnetic stability tests in the field and/or laboratory used to be thrown away as the unsuitable fossils to the paleomagnetic study, the present author has proposed in this comment to pay much attention to that some of the unstable natural remanent magnetizations of rocks might be very original fossils of the paleomagnetic field, therfore, the unstable natural remanent magnetizations should be more carefully examined, and sometime even the stable one might also been re-checked again.