Introduction to Yonghong Dragon: Yonghong Dragon is the symbol of the original Yonghong Reservoir in Lake Biwa. It was built because of the great development of water conservancy in the 1970s to ensure that local people's crops could be harvested despite droughts and floods. To commemorate their gratitude, local people carved "Yongshui Reservoir" on the stone dragon pictogram, which means that Mao Zedong Thought will shine forever and be immortal. Therefore, the pictographic stone of Shilong is simply called Yonghong Dragon.