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There has been spectacular progress in the study on multiferroics, which is expected to make a realistic step toward an electrical control of magnetism or four state memories.I will illustate our general spin order theory relating to this topics and propose a mechanism to pin skyrmions in chiral magnets.In our literature, the fibre bundle concept imagined by mathematicians becomes the "catwalk" for spins to show various exotic spin orders that were perceived in multiferroic materials.