Royal jelly is worker bees' secretion that is used in the nutrition of larvae, as well as adult queens. It is secreted from the glands in the hypopharynx of worker bees, and fed to the choosed small lavae to make a new queen when the old one is either weakening or dead.The feeding triggers the development of queen morphology, including the fully developed ovaries needed to lay eggs.
Qinghai-Tibet plateau is the main place of cole flower bee-farming industry in China. Highland environment provides ideal non-pollution conditions for yielding high quality bee products.