For teenagers in the developmental period, the nutrients needed by bones suddenly increase. If children want to grow up in the developmental period, they really need to supplement bone nutrients and improve bone mass reserves. Jingu powder should be Yirijian's solid polypeptide beverage. The unique hydrolyzed egg yolk powder and casein phosphopeptide are natural bioactive peptides extracted by the world's leading technology, which are gold ingredients beneficial to bone growth and bone toughness and strength. At present, it is pre-sold by dealers and should be officially listed in September.