Begin from childhood, kidney essence is filled gradually fill, the person begins to grow hair Yo, to period of black prime of life, kidney essence is filled further fill, true tooth unripe, body husky, bones and muscles is able-bodied.

• 从幼年开始，肾精逐渐充盛，人就开始生长发育，到青壮年时期，肾精进一步充盛，则真牙生、体壮实、筋骨强健。