How does buying a pound of pork affect CPI?

The Sichuan Survey Team of the National Bureau of Statistics released data on April 12.
In March, the consumer price of Sichuan fell by 0.
5% month-on-month, pork prices fell by 12.
3% month-on-month, and Sichuan pork returned to the "10 yuan +" era
.

How is "0.
5% decrease from the previous quarter" calculated? If you buy a pound of pork at the vegetable market, will it affect the CPI? On April 15th, the reporter walked into the farmer's market together with the price collectors of the Consumer Price Investigation Division of the Chengdu Investigation Team of the National Bureau of Statistics to reveal how consumer price data was collected and how the consumer price index was born
.

Collect prices of 130 agricultural products at once

Consumer prices, as the name suggests, refer to the prices of goods and services purchased by urban and rural residents and used for daily consumption
.

As a frequent visitor to the Daxue Road Indoor Farmer’s Market, "Every 5 Every 0" (Note: The ending with 5 and 0, such as the 5th, 10th, 15th, 20th, 25th, 30th of each month), national statistics Yang Yunguang, a price picker from the Consumer Price Investigation Division of the Chengdu Investigation Team, will appear in the farmer’s market on time
.

How to collect? "How much is the apple today? How much is the pineapple?" When he walked into the market, Yang Yunguang asked each stall carefully.
As more and more stalls walked, the price list in Yang Yunguang's hand was gradually filled
.

How to ensure that the price is true? Yang Yunguang told reporters that he has collected prices at the Daxuelu Indoor Farmers Market for more than ten years and has established trust with merchants.
Some merchants who do not cooperate with price collection will be excluded from the scope of price collection.
At the same time, he will also base on listed prices and on-site prices.
To judge the transaction situation, and consider the possibility of consumers' "bargaining"
.

The selection of survey points has these particulars

Why choose Daehanglu Indoor Farmers Market? Li Chuanjun, director of the Consumer Price Investigation Division of the Sichuan Investigation Corps of the National Bureau of Statistics, introduced the background of the collection
.

“Agricultural product prices are closely related to everyone’s lives.
In addition, we also need to collect service industry prices, industrial product prices, etc.
, covering air tickets, hotels, precious metals, etc.
, with a total of 268 basic categories in eight categories
.

According to Li Chuanjun, there are close to 100 farmer's markets like the Daxuelu Indoor Farmer's Market in the province
.

Individual errors do not affect accuracy

Some people may ask, "The price of pork has been cut, why can't I feel it?" Kang Hui, a third-level investigator of the Sichuan Investigation Team of the National Bureau of Statistics, told reporters that the gap between CPI data and everyone's psychological feelings is caused by multiple reasons
.

"First of all, what we collect in the market is the mode price.
The purpose is to remove the extreme value and reflect the consumer price of most consumers.
The collected price is the most frequently purchased but not the same as everyone’s purchase price.

Secondly, there are hundreds of farmers’ markets in Chengdu, but we have not collected prices in all of the farmers’ markets.

According to Kang Hui, the collection of consumer prices also takes into account unexpected circumstances
.