What is the earliest book that recorded buoyancy in the world?

Buoyancy is a natural phenomenon that we often see in our daily life. For example, when we swim, if we bring a swimming ring, we won't sink. If you put an empty wooden box into the water, it will float easily. These phenomena are all caused by the buoyancy of water. Therefore, this phenomenon will occur when all objects with the same volume and light specific gravity are immersed in liquid. In China's ancient books, there are many records about the use of buoyancy. For example, it is recorded in the ancient book Mozi Xia Jing: "The shape is big, and its depth is shallow, which is called the device." "The balance of weight and shape is heavy and shallow, not shallow. If it is easy to be one of the five. " This is the earliest buoyancy record in the world. This principle was put forward by Archimedes, a great foreign scientist, over 200 years ago.