What does the newspaper industry mean by "one long and two total systems"

The site of two towns was discovered in 1934 and excavated in 1936. It is the first typical site of Longshan culture. 1977 is listed as a provincial key cultural relics protection unit. According to the British version of the Handbook of World History, from 2800 to 2000 BC, China and Rizhao were the largest cities in Asia. The site is located on the river bank in the northwest of two towns in Donggang District, Rizhao City, Shandong Province. It is a hilly area that gradually rises above the plain from east to west, covering an area of nearly one million square meters. Its cultural accumulation is 2-5 meters, the upper layer is Spring and Autumn Culture, and the lower layer is Longshan Culture, and a large number of stones, bones, jade articles and pottery have been unearthed. Most of the unearthed stone tools are finely ground and drilled. There are many kinds of stone tools, mainly axe, spear, shovel, graupel, chisel, nine-piece, sickle, arrow and so on. There are many kinds of arrows in bone wares, as well as fishhooks and darts made of bones. Judging from the unearthed artifacts, agriculture in Longshan culture period has made great development and progress. The widespread use of stone tools and bone implements is a sign of the improvement of agricultural production. In addition, the discovery of building city walls reflects the frequent predatory wars in the late primitive society. Most of these defense facilities were built to prevent neighboring tribes from plundering property.