From the Tianjin Eye Ferris wheel east across the Sancha River is the Haihe River, the largest water system in northern China, one of the seven major rivers in China. The Haihe River system was collectively known as "Jiuhe" in ancient times. During the Song Dynasty, the dry current of Haihe River was the lower reaches of the Jiehe River. Jin and Yuan were renamed the Naoqi River and Daqi River. The name Haihe began to be seen at the end of the Ming Dynasty. It was not until the Qing Dynasty that the names such as Naoqi River were gradually replaced by the name Haihe. The Haihe River system consists of five main tributaries of the Haihe River and the upstream North Canal (including the North Canal, Chaobai River and the Shanghai Canal), Yongding River, Daqing River, Ziya River and South Canal. The main current of the Haihe River should be 76 kilometers from the North Confluence Exit (Dahongqiao East) to the Dagukou (Haihe Waterproof Gate); From Sancha Estuary (or Jingang Bridge) to Dagukou should be about 73 kilometers. The old Jingang Bridge is a steel bridge, similar to the Jiefang Bridge, smaller than the Jiefang Bridge, no longer exists, and replaced by the current double-storey bridge. Follow the south bank of the Haihe River to the east and cross the Jingang Bridge to the other side. With the change of perspective, the scenery of the seaside is like crossing. Hiding the high-rise buildings on the east side of the King Kong Bridge is like coming to the Seine River. The Virgin of the Seaside Building at the head of the Lion Forest Bridge tells us about the past. The Jintang Bridge proves the history of the two sides of the Haihe River. Looking eastwards over the Progress Bridge, under the embellishment of the magnificent sculptures of Bei'an Bridge, a modern and prosperous scene. The Haihe River is still the same, and the scenes on both sides of the Straits make Tianjin so beautiful.