2, the winter of the festival weather: the water began to ice; the ground began to freeze; pheasants into the water for the mirage. Chinese ancient people will be divided into three winter: "a wait for the water began to ice; the second wait for the ground began to freeze; the third wait for the pheasant into the water for the mirage." At this time, the water has been able to form ice; the land also began to freeze; pheasant into the water for the mirage of the pheasant refers to the pheasant class of large birds, mirage for the large clams. After the winter, pheasant a big bird will not be seen, but the sea can see the shell and pheasant lines and colors similar to the big clams. Therefore, the ancients believed that pheasants become big clams after the first winter