The embankment here is locally known as the "gelidi", "shalingzi" or "beikedi" (clamshell beach ridge). It includes dozens of types of clamshell, which are so numerous they form an embankment for kilometres. The inside of the embankment contains shells of various types: blood clam, button top snails, bladder moon snail, razor clam, nutmeg snail, etc. Because Clamshell Beach Ridge is composed of various clamshells and sand that has mixed together over time, it's a great place for travelers to understand the evolution of Tianjin's geology.