刘老四祖祖辈辈住在皇城根下，靠养鸡为生。一家四口人，就靠百十只母鸡下蛋讨生活。别人的鸡蛋卖四文一枚，只有他卖五文，而且一向供应大内。不是他的鸡蛋多么好，而是他的侄子刘堂在御膳房当采买太监，自然得了近水楼台之利。(All generations of Liu Laosi has been living in the foot of imperial palace, who raised chickens for a living. A family of four people only relied on more than one hundred of hens to lay eggs for a living. Others sell an egg for one cent, only he sold five cents, and he has always been supplying the interior palace. It's not because how good his eggs are, but because Liu Tong, his nephew, served the imperial kitchen as a procurement eunuch, naturally he thus benefited by standing in a favorable position.)