Determine the maturity according to the appearance characteristics of watermelon

The fruit of different varieties will show the inherent characteristics of this variety when they mature, the color of the fruit surface changes from dark to bright, the skin color is aging, the pattern of the fruit surface is clear and smooth, the ground background color is dark yellow, and the navel of the fruit is sunken inwardly. the pedicel shrinks slightly, all of which are the morphological characteristics of ripe melons, otherwise they are raw melons.