---
title: "National Bureau of Statistics: The impact of base period rotation on the year-on-year indices of CPI and PPI averages approximately 0.06 and 0.08 percentage points, respectively"
type: "News"
locale: "zh-HK"
url: "https://longbridge.com/zh-HK/news/275536668.md"
description: "The National Bureau of Statistics released the national Consumer Price Index (CPI) and Producer Price Index (PPI) data with 2025 as the base period. After the base period rotation, changes in the survey classification catalog, survey outlets, representative specifications, and weights have an impact on the price index. After calculation, the average impact of the base period rotation on the year-on-year index of CPI and PPI for each month is approximately 0.06 and 0.08 percentage points, respectively, with an overall minor impact"
datetime: "2026-02-11T01:42:01.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/275536668.md)
  - [en](https://longbridge.com/en/news/275536668.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/275536668.md)
---

> 支持的語言: [简体中文](https://longbridge.com/zh-CN/news/275536668.md) | [English](https://longbridge.com/en/news/275536668.md)


# National Bureau of Statistics: The impact of base period rotation on the year-on-year indices of CPI and PPI averages approximately 0.06 and 0.08 percentage points, respectively

The National Bureau of Statistics released the national Consumer Price Index (CPI) and Producer Price Index (PPI) data with 2025 as the base year, marking the first data release after this base year rotation. After the base year rotation, changes in the survey classification catalog, survey points, representative specifications, and weights will all have some impact on the price index, but the direction and magnitude of these factors' effects vary, and their combined effect constitutes the overall impact on the total index.

According to calculations, the impact of this base year rotation on the year-on-year indices of CPI and PPI for each month averages approximately 0.06 and 0.08 percentage points, respectively, which is relatively small overall

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