The red lines on all the pictures to right and below, show where you are supposed to make your cuts for making the lotus fit in a smaller container. Use a very sharp knife (careful don’t cut yourself). The piece in between the red lines go ahead and discard, since nothing will grow from that piece. Only cut the lotus tuber if you absolutely have to since some of the food for getting the tuber started is in the section you are discarding. This is the reason you leave 1 or two inches from the joint, since there is food in that area.