The founding history of Liaocheng, how Dongchang Lake was formed?

Dongchang Lake was built in Song Xining three years (1070 AD), in the original moat on the basis of successive generations of excavation, the existing water area of 4.2 square kilometers, for the north of the Yangtze River in China, a rare large-scale inner-city lake. Dongchang Lake draws water from the Yellow River as its source, with a year-round depth of 3-5 meters, clear water, and no industrial pollution; the scenery is pleasant, making tourists forget to come back. The center of Dongchang Lake is the 1 square kilometer square Liaocheng Ancient City with a history of 1,000 years. The style of the ancient city is well preserved, with the Guangyue Tower in the middle of the ancient city as the center, radiating to the four sides, forming the east, west, south, north and south of the four ancient city arteries, and other streets and alleys, are also distinct, vertical cross, forming a chessboard square grid-like skeleton.　Residences in the ancient city still retain the traditional architectural style of white walls, gray tiles and city roofs. On both sides of the ancient Beijing-Hangzhou Canal, the streets and alleys are lined up with various stores and residential buildings, which are built along the slopes and according to the river. Stone paving the size of the wharf, Zhu Zhu strong ancient acacia, as well as the Song Dynasty Longxing Temple Pagoda, national key cultural relics, the Qing Dynasty building Shan-Shaan Hall, will still make people taste the past canal canal heyday of the old Liaocheng's prosperity and splendor. Through the effective development and utilization of these unique tourism resources, Dongchang Lake Scenic Spot has formed the important contents of the lakeshore scenic area, ancient city culture area and canal style area.　Dongchang Lake Scenic and Historic Spot is rich in culture and tourism resources. Liaocheng has a long history, outstanding people, there have been many outstanding people in history, Zhu Yanxi, prime minister of the Ming Dynasty, Fu Yijian, Ren Kepu, famous ministers in the Qing Dynasty, Deng Zhongyue, famous painter and calligrapher, Fan Chuxian, national hero of the anti-Japanese resistance in modern times, the famous scholars and social activists Fusnian, as well as the eighties model of the youth, Zhang Haidi, and ninety leading cadres, the model of the Kong Fanshen, Lakefront Scenic Area

And so on, are the outstanding representatives of them.　In addition, ancient Chinese masterpieces such as "Water Margin", "Liaozhai", "Plum in Golden Vase" and "The Journey of the Old Woman" have all described ancient Liaocheng and Dongchang Lake. Thousands of years of historical vicissitudes and an endless stream of outstanding people have created the rich cultural background and heritage of Dongchang Lake Scenic Spot. Charming natural scenery and numerous cultural attractions also form the rich tourism resources of Dongchang Lake Scenic Spot. Within the scenic area, scattered scattered with one of the tallest existing ancient wooden buildings in China's Ming Dynasty Guangyue Tower, the jewel of Chinese Buddhist culture Song Dynasty Pagoda, set of business and culture of the great success of the exquisite architecture of the Qing Dynasty Shan-Shaan Huikuan, one of the four major private collections of China's Qing Dynasty, such as the Haiyuan Pavilion and other attractions, as well as Fusnian Memorial Hall, the national heroes of the Fan Chuxian Memorial Museum, Comrade Kong Fansen Memorial Museum, and other cultural attractions; Dongchang Lake Area In recent years, the construction of the China Fishing Association Liaocheng fishing base, Dongchang Lake Amusement Park, Jiangbei Water Bamboo Village, beach baths, boat docks, Lake Island, Lotus Island, floating spring Pavilion and a large number of sightseeing attractions and facilities, along the lake more than 30 miles of the green belt is also beginning to take shape, the West Lake Park, Xiguan 21 holes excursion stone bridges, Beiguan excursion stone bridges, and a number of key construction projects are also being actively implemented.