Postcard introduction: A set of 10 postcards for the "Ring City River Spring Landscape Belt" jointly issued by the Jinan Post Office and the Garden Management Bureau. The main picture illustrates almost all the famous landscapes in Jinan, such as Daming Lake, Baotu Spring, Black Tiger Spring, Wulongtan, Jiefang Pavilion, etc. The postcard is similar to a stamped ticket, with a sub-image and a crop line. The stamped image is an 80-point lotus flower reflecting the sun.