Group 1 - The Consumer Price Index (CPI) is a key indicator reflecting changes in consumer prices, and its data collection process was highlighted during the 16th "China Statistics Open Day" event in Chengdu [1] - Price collectors, such as Fan Yue, gather over 10,000 data points each month, focusing on various categories of fresh food, and must complete their data collection by noon to ensure accuracy [2][3] - The CPI in China includes 8 major categories and 268 basic classifications of goods and services, with data collection requiring on-site visits to 462 price collection points in Chengdu alone [2] Group 2 - The data collection process adheres to strict standards, employing the "three fixed principles" of fixed personnel, fixed points, and fixed timing to ensure data quality [4][5] - Different products have scientifically designed survey frequencies, with fresh food being surveyed every 5 days and general goods/services every month [5] - The commitment to accurate statistical data has been emphasized by the National Bureau of Statistics, which aims to maintain the credibility of government statistics through ethical practices [5]