What is the correct historical data about the pig striped black pottery bowl?

The pig-patterned black pottery bowl (unearthed from Hemudu settlement site) is a sign that human beings entered the Neolithic Age (grinding stone age) and is the most distinctive primitive handicraft department in matriarchal society. Its significance lies in breaking the previous monism that China culture originated from the Central Plains, and making people realize that the Yangtze River valley in the south of the Yangtze River is also one of the birthplaces of ancient culture in China.