On October 16, the Guangdong Investigation Team of the National Bureau of Statistics released data on the Consumer Price Index (CPI) and the Producer Price Index (PPI) for September. In September, the Guangdong CPI decreased by 0.1% year-on-year, with the decline narrowing by 0.1 percentage points compared to August, remaining unchanged month-on-month. From January to September, the average consumer price in Guangdong fell by 0.3% compared to the same period last year. The core CPI continued to rise, increasing by 0.7% year-on-year. During the same period, the provincial PPI fell by 1.8% year-on-year, with the decline remaining unchanged from August; it decreased by 0.3% month-on-month, with the decline expanding by 0.2 percentage points compared to August.

In September, the narrowing of the CPI decline by 0.1 percentage points was influenced by the end of the peak summer consumption season and tail effects from medical service price reforms, among other factors. Excluding food and energy prices, the core CPI continued to rise, with a year-on-year increase of 0.7%, widening by 0.1 percentage points compared to August. Year-on-year, the CPI fell by 0.1%, narrowing the decline by 0.1 percentage points from August. Among food prices, there was a decrease of 2.2%, with the decline expanding by 0.3 percentage points from August, impacting the CPI decline by approximately 0.42 percentage points. Within food, marine fish prices rose by 5.7%, while pork prices saw a decline of 9.0%; prices for other livestock, by-products, and eggs fell by 5.8% and 5.3%, respectively. Non-food prices increased by 0.3%, with the increase widening by 0.1 percentage points compared to August, affecting the CPI increase by about 0.27 percentage points. Within non-food items, medical service prices rose by 3.6%, contributing 0.17 percentage points to the CPI increase, serving as the main support for rising service prices.

Month-on-month, the CPI remained unchanged. Food prices increased by 0.3%, with the growth rate falling by 0.6 percentage points compared to August, contributing approximately 0.06 percentage points to the CPI increase. Within food, the high temperatures and frequent typhoons affected vegetable production and supply, leading to a 2.8% increase in fresh vegetable prices; the demand for Mid-Autumn Festival stocking coupled with high temperatures impacted the laying rate of hens, resulting in a 0.9% increase in egg prices; abundant upstream supply of live pigs led to a 0.4% decrease in pork prices; edible oil prices fell by 0.3%. Non-food prices decreased by 0.1%, with the decline remaining unchanged from August, reducing the CPI by approximately 0.06 percentage points. Among non-food items, service prices fell by 0.2%. The end of the summer consumption peak and the timing of the Mid-Autumn Festival compared to previous years led to decreases in airline tickets, travel agency fees, and hotel accommodation prices by 9.7%, 8.0%, and 4.4%, respectively.

The PPI fell by 1.8% year-on-year, with the decline remaining unchanged from August. Influenced by fluctuations in raw material prices and adjustments in supply and demand, the year-on-year PPI decline remained steady while the month-on-month decline expanded. Year-on-year, the PPI decreased by 1.8%, with the decline consistent with August. Of this, producer goods prices fell by 2.3%, with the decline narrowing by 0.1 percentage points compared to August; consumer goods prices decreased by 0.9%, with the decline expanding by 0.2 percentage points compared to August. Among the 38 major industries surveyed, there were "6 increases, 29 decreases, and 3 flat" year-on-year, with a 15.8% increase in the number of industries experiencing price increases, a decrease of 7.9 percentage points from August. Major industries with notable price fluctuations included: prices in the cultural, educational, artistic, sports, and entertainment supplies manufacturing increased by 15.6%; prices in the chemical fiber manufacturing sector fell by 8.0%; oil, coal, and other fuel processing industries saw a price drop of 7.4%; while oil and gas extraction prices declined by 7.3%, and prices in non-metallic mineral products decreased by 6.0%, with non-metallic mining and selection sector prices down by 5.6%.

Month-on-month, the PPI fell by 0.3%, with the decline expanding by 0.2 percentage points compared to August. Of this, producer goods prices decreased by 0.3%, with the decline widening by 0.1 percentage points; consumer goods prices also fell by 0.3%, with the decline expanding by 0.2 percentage points. Among the surveyed 38 major industries, there were "13 increases, 18 decreases, and 7 flat" month-on-month, with a 34.2% increase in the number of industries witnessing price increases, expanding by 7.9 percentage points from August. Prices in the petrochemical sectors fell by 0.6% due to fluctuations in international oil prices and weak market demand; prices in the computer, communication, and other electronic devices manufacturing sectors dropped by 0.4% due to fluctuations in the US dollar exchange rates, intensified market competition, and low raw material prices; while prices in the automotive manufacturing sector fell by 3.1% due to impacts from the rising presence of new energy vehicles in the fuel vehicle market.