Hello! I am a salesman in Xiamen office of Hainan Yangshengtang, and I am glad to answer this question for you. In fact, it is set for safety reasons. For example, the adult vitamins in the Yangshengtang need to be pressed hard to open, as long as it is to prevent children from eating without authorization. Although it is a health care product, what adults eat is still unsafe for children. I hope I can help you! As long as you have product knowledge and questions about Yangshengtang, I will be happy to answer them for you!