Group 1 - The discovery of two wooden clogs at the Cihu site in Ningbo, dating back approximately 5,365 years, pushes the history of clogs in China back by 3,600 years [4][9] - The clogs are designed with a wider front and narrower back, indicating that the ancient people understood foot shape and comfort [7][8] - The clogs feature holes for laces, which were embedded in grooves to prevent wear and provide a comfortable fit while walking [5][7] Group 2 - The craftsmanship of the clogs involved cutting, drilling, and polishing using stone tools, showcasing the intelligence and skill of ancient artisans [8] - Prior to this discovery, the earliest known wooden clogs in China were found in a tomb from the Three Kingdoms period in Anhui, discovered in 1984 [8][9] - The evolution of footwear in China reflects the adaptation to nature and the pursuit of practical and aesthetic values throughout history [16]