On August 14, a "fresh" hand-drawn drawing of Hexi Water Conservancy in Ningxia was unveiled. Since the successful application of the Ningxia Yellow River Diversion Ancient Irrigation District in 2017, the Ningxia Water Conservancy Museum has discovered a surviving Ningxia Hexi Water Conservancy Map in the National Library. After many communications and consultations, this precious river canal map was reproduced in full size. Photo by Yu Jing

Release time: 2020-08-14 18:01:22 【Editor: Li Jun】