The city of Zunyi in Guizhou province, China, has developed a trading center for peppers, known as Xiazi, which has become a central hub for the trade of chili peppers. The market, established in 2017, covers 31 hectares and facilitates the annual trade of 750,000 tons of peppers. In the past year, it saw a transaction volume of nearly 300,000 tons, with a total transaction value of around 1 billion US dollars. The Pepper Index in Guizhou Province is used to determine market trends and prices for peppers.