TWO ANTIQUE CHINESE BAMBOO DIZI? FLUTES (INCOMPLETE?) - SIGNED

I FOUND THESE TWO ANTIQUE BAMBOO FLUTES - I THINK POSSIBLY INCOMPLETE AND MAY NEED ATTACHMENTS ON THE ENDS?  NOT SURE.  THEY EACH HAVE THE SIX TONE HOLES, A BLOWING HOLE AND A MO KONG HOLE (FROM WHAT I GATHER THIS NEEDS A DIMO MEMBRANE WHICH IS MISSING)  I CANNOT GET A SOUND OUT OF THEM BUT NOT SURE IF THIS IS MY IGNORANCE OR BECAUSE OF MISSING PARTS.  NONETHELESS, I WAS TOLD THEY ARE ANTIQUE AND DO BELIEVE THIS TO BE TRUE.  EACH MADE FROM ONE SOLID PIECE OF BAMBOO WHICH APPARENTLY IS HOW THE ANTIQUE ONES WERE MADE (THESE DAYS THEY ARE TWO PIECES JOINED BY A METAL BAND)   REFER IMAGES