On this day, 39 years ago, November 28, 1986 (October 27, 1986, the Lunar Calendar), a major archaeological discovery of the Pearl River Neolithic culture. On November 28, 1986, the first bent limb burial tomb and a batch of painted pottery in the Pearl River Delta were excavated at the Shankezhou Shell Hill Site in Guangli Town, Gaoyao County, Guangdong Province. This discovery shows that the Neolithic culture in the Pearl River Basin did not lag behind that of the Yellow River and Yangtze River basins. The Beiqiu Site in Gaoyao County is located on the edge of the Pearl River Delta, facing the Xijiang River Estuary, more than five kilometers away from Dinghu Mountain, a world-famous nature reserve, and has an area of several thousand square meters. A large number of clams are still left here today. In 1983, the Gaoyao County Cultural Relics Expedition Team excavated a large number of Neolithic relics such as shells, stone axes, stone chisels, and stone adze here. The excavation of the bent limb tomb this time proves that this was an ancient human cultural site in the late primitive society four or five thousand years ago. The so-called bent limb burial refers to the bending of four limbs. Graves buried with bent limbs were more common in ethnic minority areas in the Yellow River and Yangtze River basins in the past, but this is the first time they have been discovered in the Pearl River Basin.