In 2011, during archaeological excavations at the Laohudun Site in Gaohu Town, Jing'an County, Jiangxi Province, an astonishing  Eggshell-Thin Black Pottery Gu (a drinking vessel) came to light. It is completely black, and at its thinnest point, it measures only 0.4 millimeters. Archaeologists around the world have described it as "the most delicate creation of earth's four-thousand-year-old civilization." As the proverb goes, "A decade's effort goes into forging a single sword." How did Wu Yingfang manage to revive this long-lost craft? The video will soon provide the answer!